Potassium hydroxide and hypochlorous acid will combine to form hypochlorite ions. Along with the additional strong base, part of weak acid would be consumed during the process. A mole of KOH will consume a mole of HClO and create a mole of ClO, based on the balanced chemical equation.
Why is HClO such an effective acid?The acid having the more electronegative element, in this case HClO, is stronger when there are acids with components of equal oxidized form, such as HClO & HIO.
HOCl or HCl, which has a higher acidity?Because Cl has a higher electronegative polarity than Br, HOCl is a stronger acid that HOBr. Due to Br's bigger size than Cl's, binary acids like HBr and HCl have H-Br bonds that are longer than H-Cl bonds. In turn, HBr is a stronger acid that HCl because the H-Br bond is weaker than the H-Cl bond.
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the three states of matter are solid, liquid, and gas. in which state does matter take up the most volume? a. they all take up the same volume. b. in the gas state c. in the liquid state d. in the solid state
We are know that gas takes the shape of the container it is kept in. As a result, matter occupies the largest volume in the gaseous state.
What do you mean by matter?Matter is anything that occupies space and has mass, in other sense, matter is the "something" from whichthe universe is formed. The fundamental building components of all stuff are called elements. They don't change into the other elements through normal chemical processes and have distinct chemical and physical properties.
State of matter.The 3 states of matter include solid, liquid, & gas. It is possible to comprehend why they have various qualities by looking at the arrangement of their particles.
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natasha wrote a table comparing pure substances and mixtures. what correction should be made to natasha's table? a elements and compounds are considered mixtures. b pure substances can be separated using physical means. c mixtures contain at least three or more substances. d mixtures are substances that are not chemically combined.
No correction is required in table of pure substances and mixtures.
A mixture contains further than one chemical substance, and thus isn't pure. The substances in a mixture can be rudiments, composites, or both.
Pure substances can be separated using physical means. rudiments and composites are considered fusions. fusions are substances that aren't chemically combined. fusions contain at least three or further substances
A mixture is a physical combination of two or further substances. These aren't combined chemically. The factors retain their individual properties indeed after forming a mixture.
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Complete and balance each of the following equations. If no reaction occurs, write NOREACTION. Express your answer as a chemical equation. Identify all of the phases in your answer.
1) KCl (aq) + CaS (aq) -->
2) CrBr2 (aq) + Na2CO2 (aq) -->
3) NaOH (aq) + FeCl3 (aq) -->
4) NaCl (aq) + Hg2(C2H3O2)2 (aq) -->
5) (NH4)2SO4 (aq) + SrCl2 (aq) -->
6) NH4Cl (aq) + AgNO3 (aq) -->
The following equations. If no reaction occurs: 1) NOREACTION, 2) CrBr2 (aq) + Na2CO2 (aq) --> 2NaBr (aq) + Cr(CO3)2 (s), and given below:
What is reaction?Reaction is the process by which a material or substance undergoes a change due to the introduction of an external factor. It is an action or response to a stimulus, and can be either physical or chemical in nature. Chemical reactions involve changes in the composition of the substances involved, while physical reactions involve changes in the physical properties of the substances.
3) NaOH (aq) + FeCl3 (aq) --> NaCl (aq) + Fe(OH)3 (s)
4) NaCl (aq) + Hg2(C2H3O2)2 (aq) --> 2NaC2H3O2 (aq) + Hg2Cl2 (s)
5) (NH4)2SO4 (aq) + SrCl2 (aq) --> 2NH4Cl (aq) + SrSO4 (aq)
6) NH4Cl (aq) + AgNO3 (aq) --> AgCl (s) + NH4NO3 (aq)
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module 9 lesson 3 assignment: concentration directions: use what you have learned about molarity, molality, mass percent, and mole fraction to solve the following problems. be sure to show your work and circle or highlight your answer. please submit your work via the link provided. calculate the molarity of 0.060 moles nahco3 in 2500. ml of solution.
A solution with a molarity of 0.024 M contains 0.060 moles of nahco3 in 2500 ml. When describing how concentrated a solution is, molarity is an essential measurement.
The solution's volume has a big impact on the concentration, a solution based on molarity. In this post, we learned about molarity and molality, along with their units and computation procedures. When the solute and solvent interact, any solution can form in a homogenous mixture. A solute is a substance that is present in a solution in less of it than the solvent, and it dissolves in the solvent, which is present in a greater quantity.
Molarity is the quantity of solute in moles per litre of solution.
2.5 L and 0.060 mol of NaHCO3 are equal to 0.024 M.
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You are given a 1.50-g mixture of sodium nitrate and sodium chloride. You dissolve this mixture into 100 mL of water and then add an excess of 0.500 M silver nitrate solution. You produce a white solid, which you then collect, dry, and measure. The white solid has a mass of 0.641 g. a. If you had an extremely magnified view of the solution (to the atomic-molecular level), list the species you would see (include charges, if any). b. Write the balanced net ionic equation for the reaction that produces the solid. Include phases and charges. c. Calculate the mass percent of sodium chloride in the original unknown mixture.
A. If you had an extremely magnified view of the solution (to the atomic-molecular level), the species you would see would include sodium ions (Na+), nitrate ions (NO3-), chloride ions (Cl-), and silver ions (Ag+).
What is atomic-molecular?Atomic-molecular level refers to the scale at which the behavior of atoms and molecules can be studied and understood. At this level, the structure and properties of materials can be explained in terms of the interactions between atoms and molecules.
b. The balanced net ionic equation for the reaction that produces the solid is as follows:
Na+ + Cl- + Ag+ → AgCl(s) + Na+
c. To calculate the mass percent of sodium chloride in the original unknown mixture, we need to determine the mass of sodium chloride in the mixture. Since the original mixture had 1.50 g of sodium nitrate and sodium chloride combined, we can subtract the mass of sodium nitrate from this to find the mass of sodium chloride:
Mass of sodium chloride = 1.50 g - 0.859 g = 0.641 g
To calculate the mass percent of sodium chloride, we can divide the mass of sodium chloride by the total mass of the mixture and multiply by 100:
Mass percent of sodium chloride = (0.641 g / 1.50 g) × 100 = 42.7%.
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true/false. Given the equation representing a reaction at equilibrium: N2(g) 3H2(g) ( 2NH3(g) Explain, in terms of collision theory, why the rate of the forward reaction decreases when the concentration of N2(g) is decreased.
Less actual collisions. Because there is fewer N₂ molecule to collision with H₂ molecules, the forward reaction's pace slows down. Because crashes happen less frequently, the rate decreases.
What does the term "reaction" in chemistry mean?In a chemical reaction, one or more chemicals, usually known as reactants, change into same or more other compounds, frequently referred to as products.
What are reactions and how do they differ?Pairing, decomposition, fixed, double-replacement, and conflagration are the five fundamental kinds of chemical processes. You may classify a reaction into one of these groups by looking at the reactants and products. Several categories will apply to some reactions.
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The complete question is-
Given the equation representing a reaction at equilibrium:
N₂(g) + 3H₂(g) <==>2NH₃(g)
Explain, in terms of collision theory, why the rate of the forward reaction decreases when the concentration of N₂(g) is decreased.
three moles of an ideal monatomic gas are at a temperature of 345 k. then, 2438 j of heat is added to the gas, and 962 j of work is done on it. what is the final temperature of the gas?
The final temperature of gas is approximately 436 K . if three moles of an ideal monatomic gas are at a temperature.
What are monatomic atoms?Monoatomic (monatomic): A molecule composed of just one atom, and lacking any covalent bonds. The noble gases (He, Ne, Ar, Kr, Xe, and Rn) are all monoatomic, whereas most other gases are at least diatomic.
What is monatomic or diatomic?Complete answer: Monatomic gas is the gas that has molecules containing a single atom only while diatomic gas has the molecule containing two atoms. Similarly, triatomic gas contains molecules with three atoms. The hydrogen gas exists as a diatomic molecule, as it contains two atoms of hydrogen.
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which statement describes why energy is released in a nuclear fusion reaction based on mass-energy equivalence?
The correct statement is for nuclear fusion reaction: A)For large nuclei, the mass of the original nucleus is greater than the mass of the products.
What was the explanation for mass-energy equivalence?This statement is based on the mass-energy equivalence, which states that the mass and energy of a system are equivalent and can be converted into each other according to the famous equation E=mc². In nuclear fusion reactions, the total mass of the products is less than the total mass of the reactants. This difference in mass is converted into energy and released as radiation, in the form of heat, light and other forms of radiation. Therefore, in a nuclear fusion reaction, the binding energy of the lighter nuclei is less than the binding energy of the heavier nucleus and the mass of the original nucleus is greater than the mass of the products, that's why energy is released.
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Which statement describes why energy is released in a nuclear fusion reaction based on mass-energy equivalence?
A)For large nuclei, the mass of the original nucleus is greater than the mass of the products.
B)For large nuclei, the mass of the original nucleus is less than the mass of the products.
C)For small nuclei, the binding energy of the lighter nuclei is greater than the binding energy of the heavier nucleus.
D)For small nuclei, the binding energy of the lighter nuclei is less than the binding energy of the heavier nucleus.
Liquid Measurements Water Isopropyl Alcohol Mass A Graduated Cylinder (9) 17.83 18.07 Volume (mL) 5 5 Mass B: Graduated Cylinder with Liquid (9) 23.54 23.9 Mass B-A Liquid (9) 5.71 5.83 Density (g/mL) 3.56 3.61 Percent Error (%)
the percent error for the density of the liquid in each graduated cylinder is -1.38% in A and 1.39% in B
To calculate the percent error for the density of the liquid in each graduated cylinder, we need to use the following formula:Error percent is calculated as [(experimental value - acceptable value) / accepted value]. x 100. First, we'll calculate the density of the liquid in graduated cylinder A: Density of liquid A = mass of liquid A / volume of liquid A = (23.54 - 17.83) g / 5 mL = 3.56 g/mLNow we'll calculate the percent error for density of liquid A: % Error = [(3.56 g/mL - 3.61 g/mL) / 3.61 g/mL] x 100 = -1.38%. Next, we'll calculate the density of liquid B: Density of liquid B = mass of liquid B / volume of liquid B = (23.9 - 18.07) g / 5 mL = 3.61 g/mL. Now we'll calculate the percent error for density of liquid B:% Error = [(3.61 g/mL - 3.56 g/mL) / 3.56 g/mL] x 100 = 1.39%. It's worth noting that the percent error for the density of liquid A and B are opposite in sign and similar in magnitude, this implies that the measurement errors in mass and volume are likely to be canceled out when measuring the density, resulting in relatively low error.
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f the original mass of wo3 is 37.0 g, how many grams of co2 must be collected from the reaction in order to infer that the solid that remains is pure tungsten
11 grams of CO2 must be collected from the reaction in order to infer that the solid that remains is pure tungsten.
What is chemical reaction example?A chemical reaction is a process in which reactants react chemically and convert into products by chemical transformation. For example, Respiration – we inhale oxygen which reacts with glucose and produces carbon dioxide, water and energy.
How does a chemical reaction start?When atoms establish or break chemical bonds, chemical processes take place. Reactants are the substances that begin a chemical reaction, while products are the compounds that are created as a result of the reaction.
Given:
WO3 = 37.0 g
Chemical reaction,
2WO3(s) + 3C(s) ↔ 2W(s) + 3CO2(g)
(37 grams WO3) / (232 grams) = 0.159 moles WO3(0.159 moles WO3) x (3 moles CO2 / 2 moles WO3) = 0.239 moles CO2(0.239 moles CO2) x (44 grams CO2) = 10.5 grams
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valency of all elements
Answer:
Number Valency
Valency of Hydrogen 1 1
Valency of Helium 2 0
Valency of Lithium 3 1
Valency of Beryllium 4 2
Valency of Boron 5 3
Valency of Carbon 6 4
Valency of Nitrogen 7 3
Valency of Oxygen 8 2
Valency of Fluorine 9 1
Valency of Neon 10 0
Valency of Sodium (Na) 11 1
Valency of Magnesium (Mg) 12 2
Valency of Aluminium 13 3
Valency of Silicon 14 4
Valency of Phosphorus 15 3
Valency of Sulphur 16 2
Valency of Chlorine 17 1
Valency of Argon 18 0
Valency of Potassium (K) 19 1
Valency of Calcium 20 2
Valency of Scandium 21 3
Valency of Titanium 22 4
Valency of Vanadium 23 5,4
Valency of Chromium 24 2
Valency of Manganese 25 7, 4, 2
Valency of Iron (Fe) 26 2, 3
Valency of Cobalt 27 3, 2
Valency of Nickel 28 2
Valency of Copper (Cu) 29 2, 1
Valency of Zinc 30 2
in the beta oxidation pathway, when the starting fatty acid contains n carbons, what is the product of the enzyme acyl-coa synthetase? assume the starting saturated fatty acid contains n carbons and n is an even number.
In the beta oxidation pathway, the product of the enzyme acyl-coa synthetase when the starting fatty acid contains n carbons is, an acyl-CoA molecule.
What is Beta oxidation pathway?The word "β-oxidation" refers to an oxidation that occurs in the fatty acid's -carbon when two carbon atoms are removed from the carboxyl end of the molecule at a time. By means of a process known as beta oxidation, fatty acids with an even or odd number of carbon atoms as well as unsaturated fatty acids are oxidised.
The acyl-CoA molecule contains n-carbon fatty acid, which is covalently bound to Coenzyme A (CoA) through a thioester bond. The starting fatty acid is a saturated fatty acid containing n carbons, where n is an even number.
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a 15.0-g sample of nitrogen is burned in excess oxygen. the result is a single gas with a mass of 49.3 grams. what is the empirical formula of the gas? group of answer choices
When a 15.0-g sample of nitrogen is burned in excess oxygen. Which result is a single gas with a mass of 49.3 grams. the empirical formula of the gas is NO2.
What is a Nitrogen?The chemical element with the atomic number 7 and the letter N is known as nitrogen. The lightest element in group 15 of the periodic table, often termed as the pnictogens, nitrogen is a nonmetal. It is a typical element in the cosmos, believed to be eighth in the Milky Way and the Solar System in terms of overall abundance.
Nitrogen has the following general specifications:Symbol: NAtomic number: 7Atomic mass: 14.0067 uElectrons per shell: 2,5Electron configuration: [He] 2s22p3Discoverer: Daniel RutherfordChemical series: Nonmetal, Pnictogen, Period 2 elementTo know more about Nitrogen visit
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Determine the electron geometry (eg) and molecular geometry (mg) of the underlined atom CH3OCH3.
Answer options:
eg=trigonal bipyramidal, mg=tetrahedral
eg=linear, eg=linear
eg=tetrahedral, mg=tetrahedral
eg=tetrahedral, mg=bent
eg=octahedral, mg=square planar
Electron geometry (eg) = tetrahedral and molecular geometry (mg) = tetrahedral, is correct option for given question.
What is the geometry of the molecule?The organization of atoms in a molecule in three dimensions is known as molecular geometry, commonly referred to as the molecular structure. A compound's polarity, reactivity, state of matter, colour, magnetism, and biological activity can all be determined by knowing its molecular structure.
What distinguishes molecular geometry from electron geometry?Molecular geometry is the configuration of atoms within a molecule, typically in relation to a single center atom. Electron geometry is the configuration of the electron pairs around with a central atom.
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when has glucose been broken down from its original 6 carbon molecule to 6 molecules of carbon dioxide?
After the second turn through the Krebs cycle the glucose molecule has been broken down completely from its original 6 carbon molecule to 6 molecules of carbon dioxide.
Krebs cycle starts when acetyl-CoA combines with a four-carbon molecule. That molecule is called OAA. This produces citric acid which has six carbon atoms. The Krebs cycle is also known as the citric acid cycle. After the formation of citric acid, it goes through a series of reactions and release energy. The energy is captured in molecules of NADH, ATP, and FADH2. Carbon dioxide releases as a waste product of the reactions. The final step of the Krebs cycle is the re-generation of OAA. This is the molecule that began the Krebs cycle. This molecule is needed for the next turn through the cycle. Two turns are needed for the complete process. It is because of the glycolysis produces two pyruvic acid molecules when it splits glucose.
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what trend in ionization energy do you see as you go down a group/family on the periodic table? what causes this trend?
As you progress down a group, the first ionization energy normally drops. This is because the outermost electron is typically held less securely and can be removed with less energy because it is farther away from the nucleus.
As you descend a group family on the periodic table, what pattern do you notice?The electronegativity of a group diminishes from top to bottom. This is due to the fact that as atomic number decreases within a group, the atomic radius—the separation between the valence electrons and nucleus—increases.
As you move through the periodic table, what pattern do you notice in the ionization energy?First ionization energy normally rises from left to right across a period on the periodic table. This is because.
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Typically, the initial ionization energy decreases as you move along a group. This is because the outermost electron is typically held less securely and can be removed with less energy because it is farther away from the nucleus.
As you descend a group family on the periodic table, what pattern do you notice?A group's electronegativity decreases at top to bottom. This is because the atomic radius—the distance in between outer electrons and nucleus—increases as atomic number within a group decreases.
What pattern do you see in the ionization energy as you progress through the periodic table?On the periodic table, the first ionization energy typically climbs across a period from left to right.
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Consider the following isomerization reactions of some simple sugars and values for their standard Gibbs free energy ΔG∘:reaction A:reaction B:glucose-1-phosphatefructose-6-phosphate⟶⟶glucose-6-phosphate,glucose-6-phosphate, ΔG∘=−7.28 kJ/mol ΔG∘=−1.67 kJ/molPart ACalculate ΔG∘ for the isomerization of glucose-1-phosphate to fructose-6-phosphate.
Figures for such simple sugars' esterification reactions with That is -5.61 kj/mol and the typical Kinetic free energy "G" reaction.
What are free energy of Gibbs and entropy?Entropy is a unit of measurement for the amount of heat that diffuses or is communicated during a chemical reaction. How is it has said Gdp energy is free? Gibbs energy is frequently referred as as inspiration and self to initiate a chemical reaction and is evaluated at constant pressure and temperature.
Gibb's spontaneous energy is often called free energy because it is always available. The reaction can acquire this energy if necessary without making any effort. To calculate the variance in Gibb's free energy, hysteresis and the system's total heat and entropy are added.
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The drawings below represent aqueous solutions. Solution A is 2.00 L of a 2.00-M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of a 3.00-M aqueous solution of potassium hydroxide. a. Draw a picture of the solution made by mixing solutions A and B together after the precipitation reaction takes place. Make sure this picture shows the correct relative volume compared to solutions A and B, and the correct relative number of ions, along with the correct relative amount of solid formed. b. Determine the concentrations (in M) of all ions left in solution (from part a) and the mass of solid formed.
The mass of the solid is 293 g. if A 2.00 L of 2.00-M aqueous solution of copper(II) nitrate. Solution B is 2.00 L of 3,00-M aqueous solution of potasSium hydroxide.
What can happen if your potassium level is too low?A low potassium level can make muscles feel weak, cramp, twitch, or even become paralyzed, and abnormal heart rhythms may develop. The diagnosis is based on blood tests to measure the potassium level. Usually, eating foods rich in potassium or taking potassium supplements by mouth is all that is needed.
Can low potassium be cured?Hypokalemia is treatable. Treatment usually involves treating the underlying condition. Most people learn to control their potassium levels through diet or supplements.
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true or false: the exponents in a rate law are always equal to the coefficients in a balanced chemical reaction.
The give statement that the exponents in a rate law are always equal to the coefficients in a balanced chemical reaction is false.
What is reaction rate?Reaction rate is the rate at which a chemical reaction moves forward. It is frequently described in terms of either the concentration of a reactant that is consumed in a unit of time or the concentration of a product that is generated in a unit of time (amount per unit volume).
The exponents in a rate law, which describe the dependence of the reaction rate on the concentrations of the reactants, are determined experimentally and may not be equal to the coefficients in the balanced chemical equation for the reaction.
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When zinc is heated redness in a current of steam,hydrogen gas is obtained.write an equation
when a Zn react with the steam ie, heated with a steam the product formed wiil be Zinc hydroxide and hydrogen gas.
Zn(OH)2 + H2
how does rank the compounds nh3, n2, c2h6, ncl3, h2 in terms of decreasing capillary action in a glass tube
The given compounds ranked based on the decreasing capillary action in a glass tube NH₃ < NCl₃ < C₂H₆ < N₂ < H₂.
How would you describe the capillary action?A meniscus will turn upward as a result of water adhesion to a vessel's walls, which exerts an upward force on the liquid at the liquid's edges. The surface tension maintains the surface's integrity. When the adhesion to the walls is greater than the cohesive forces between the liquid molecules, capillary action takes place.
The movement of liquids in constricted areas is known as capillary action. The force of molecular attraction between a liquid and the solid surfaces around it is to blame.
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0.50 moles of gas take up 10.5 L
of space under constant pressure
and temperature conditions.
What volume is required to hold
2.0 moles of the gas?
Determine the product of the following reaction.1. LiAIH42. H2O
The product of the reaction using LiAIH₄ 2.H₂O is attached below.
In simple terms, what is a chemical reaction?One or more substances, also referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction. Combustion is one of the five fundamental types of chemical reactions, along with combination, decomposition, single-replacement, and double-replacement.
Chemical reactions begin with reactants, and the products of a reaction are the substances that were produced. The common chemical formula can be used to represent a chemical reaction: Reaction products. During chemical reactions, bonds shatter and reform. Also, the opposite outcome of the reaction happens.
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1.a student mixes baking soda and vinegar in a glass. the results are a bubbly chemical reaction. do you think any new substances are being created in this mixture? if so, how do you know?
2.suppose this was done on top of a balance. do you think the mass would change as the reaction proceeded?
3.what do you think would happen to the mass if the reaction took place inside a sealed plastic bag?
The baking soda and vinegar are an acid-base reaction which is chemical. Because of this, a new substance is formed. The bubbles show that a gas is created (carbon dioxide
Baking soda and vinegar cause a chemical acid-base reaction. As a result, a new substance is formed. The bubbles indicate the formation of a gas (carbon dioxide). Bicarbonate of soda, also known as "baking soda," is a fantastic household item that can be used for so much more than baking! See some of the best baking soda uses, from removing stains to cleaning teeth to even getting rid of your sweet tooth. We always had baking soda on hand when I was a kid to leaven biscuits, dumplings, and various quick breads. Mom put an open box of it in the fridge to absorb odours, and she had us drink a bit of it mixed with water to settle upset stomachs.
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Which of the following nuclear processes results in an increase in the number of neutrons in the product element? 1. Alpha emission II. Beta emission III. Positron emission IV. Electron capture O A) III and IV O B) II, III, and IV OC) | and II O D) I, II, III, and IV OE) I, II, and I
The atomic number of an element increases as a result of beta decay, where one of the neutrons in the nucleus abruptly transforms into a proton.
What are nuclear reactions?Atoms occasionally transform abruptly into whole other atoms without prior notice since they aren't content with being who they are. Nuclear reactions, which transform one nucleus into another nucleus, are based on this inexplicable shift from one sort of element into another. Nuclear reactions take place when the ratio of protons and neutrons in an atom's nucleus changes, much way chemical reactions do when molecules exchange electrons, transforming one compound into another.Protons can sometimes be forced out of the nucleus or transformed into neutrons in certain nuclear processes.When an element's atomic number (number of protons) changes, so does its name since we determine what it is called by looking up the element's number on a periodic table and then reading off its name. Since an atom of potassium (atomic number 19) can abruptly change into an atom of calcium, nuclear processes resemble alchemy in this regard (atomic number 20). We'll discuss more about the radiation discharge in a moment, but that is the only indication that anything has changed.To Learn more About beta decay refer To:
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? Anyone know the answer
The amount of heat gained or lost by a sample (q) can be calculated using the equation q = mcΔT, where m is the mass of the sample, c is the specific heat, and ΔT is the temperature change.
In which process is heat not added?In adiabatic process, no transfer of heat takes place between system and surroundingAdiabatic process: When a thermodynamic system undergoes a change in such a way that no exchange of heat takes place between Systems and surroundings, the process is known as an adiabatic process.During an isobaric expansion process, heat enters the system. Part of the heat is used by the system to do work on the environment; the rest of the heat is used to increase the internal energy.:Yes, heat can be added to a body without causing the temperature of the body to rise as in the case of latent heat being added to cause a change of state of the body or isothermal process
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why do you think the molecular geometry and bond angle for these molecules (ch4, nh3, and h2o) are different even though they have the same amount of total electron groups?
This is because of the variation in lone pairs CH4 has no lone pair [Tetrahedral], NH3 has 1 lone pair[Pyramidal], H2O has 2 lone pair[Bent].
What is bond angle?A complex molecule's or ion's bond angle is the angle between both the two bonds, or the angle between two orbitals that contain bonding electron pairs surrounding the central atom. It is computed using a spectroscopic approach and expressed in degrees.
What affects bond angle?There are several common aspects to take into account, including the size of the involved atoms, the presence of lone pairs, numerous bonds, big groups connected to the core atom, and the environment the molecule is situated in.
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which of the following would occur if solid nh4cl was added to an aqueous solution of nh3?
The pH decreases.
The equilibrium constant changes.
The pH increases.
NH3 will ionize to a greater extent.
Adding solid nh4cl to an aqueous solution of nh3 lowers the pH.
NH4Cl is a salt. That is, when dissolved in water, it dissociates into its corresponding ions, namely NH4+ and Cl-. NH4+ wants to balance. Dissociates into H+ and NH3. However, the solvent contains more NH3, which promotes the reverse reaction. Therefore, NH4 remains and more NH4 is produced until equilibrium is reached. This raises the pH. In chemical reactions, chemical equilibrium is the concentration of both reactants and products that do not change over time and is the state of no observable change in system properties.
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a 50.0 ml sample of koh is titrated with a o.8186 m hcl solution. the titration requires 27.87 ml of the hcl solution to reach the equivalence point. what is the moarity of the koh solution?
The molarity of the KOH solution is 0.46 M
A titration is a technique where a solution of known concentration is used to determine the concentration of an unknown solution. For titration procedures, it is important to determine the chemical reaction involved. For this problem, the reaction would be:
KOH + HCl = KCl + H2O
We calculate as follows:
0.02787 L ( 0.8186 M ) ( 1 mol KOH / 1 mol HCl ) = 0.0228 mol KOH
MOlarity =moles of solute / liters of solution
Molarity = 0.0228 / 0.05
Molarity = 0.46 M KOH
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if i have an unknown quantity of gas at a pressure of 1.2 atm, a volume of 31 liters, and a temperature of 87 0 c, how many moles of gas do i have?
The measurements for such question indicate that we possess 1.259 mol of gas.
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Pressure of gas = 1.2 atm
Volume of gas = 31 L
Temperature of gas = 87°C
Number of moles = ?
The generic gas equation will be used to address the given problem.
PV = nRT
P= Pressure
V = volume
n = number of moles
R is equal to 0.0821 atm.L/mol.K for general gases.
T = temperature in kelvin
Now we will convert the temperature.
87+273 = 360 K
by putting values,
1.2 atm × 31 L = n×0.0821 atm.L/ mol.K × 360 K
37.2 atm.L = n× 29.556 atm.L/ mol
n = 29.556 atm.L/mol / 37.2 atm.L
n = 1.259 mol
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