The volume of the solution in milliliters is 60 mL.
Mass of sodium sulfate = 8.90 g
Molarity of solution of sodium sulfate = 0.875 M
Number of moles sodium sulfate is,
[tex]Number \: of \: moles = \frac{ Mass}{ Molar \: mass}[/tex]
[tex]n = \frac{m}{ M}[/tex]
[tex] = \frac{8.90}{142} [/tex]
= 0.06 moles
There are 0.06 moles of sodium sulfate.
The volume of the solution is,
[tex]Molarity = \frac{Number \: of \: moles \: of \: sodium \: sulphate}{ Volume \: of \: the \: solution }[/tex]
[tex]Volume \: of \: the \: solution = \frac{ Number \: of \: moles \: of \: sodium \: sulphate }{Molarity}[/tex]
[tex] = \frac{0.06} {0.875}[/tex]
= 0.06 L
The volume of the solution is 0.06 L.
The volume of the solution is milliliters is,
1 L = 1000 ml
0.06 L = 0.06 × 1000
= 60 mL.
Therefore, the volume of the solution in milliliters is 60 mL.
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Refer to the graph you prepared and determine the following: Interpolation: The amount of hydrogen that would be produced by dropping 2.5 grams of zinc in 100 mL of sulfuric acid solution with th same concentration? mL
By interpolation, the volume of hydrogen gas produced is 800 mL.
What is the amount of hydrogen that would be produced by dropping 2.5 grams of zinc in 100 mL of sulfuric acid solution with the same concentration?The reaction between zinc granules and sulfuric acid solution to produce hydrogen gas is given by the equation below:
Zn (s) + H₂SO₄ → ZnSO₄ + H₂ (g)In the given reaction, zinc displaces hydrogen from solution to form zinc ions and hydrogen gas is evolved.
The volume of hydrogen gas evolved per unit time, and hence the reaction rate depends on the concentration of the sulfuric acid. The higher the concentration of the sulfuric acid, the greater the volume of hydrogen gas produced per unit time.
Considering the graph of the given volume of hydrogen produced against time for the reaction carried out by by dropping 2.5 grams of zinc in 100 mL of sulfuric acid solution with the same concentration;
By interpolation, the volume of hydrogen gas produced is 0.8 L or 800 mL.
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Are Alkaline Earth Metals more likely to GAIN the 6 needed electrons or LOSE the 2 electron that it has?
What mass of oxygen reacts with 9.2g Sodium? 4 Na + O₂ → 2 Na₂O
Answer:
About 3.201g O2
Explanation:
A buffer is prepared by mixing 37.2 ml of 0.209 m naoh with 125.7 ml of 0.231 m acetic acid. what is the ph of this buffer? (the pka for acetic acid is 4.75.)
Calculate the moles in each reactant
Acetic Acid (.231 mol/L)(0.125L)= 2.887 x 10^-2 mol AA
NAOH (.209mol/L)(.037L)= 7.733 x 10^-3 mol NaOH
As you can see, we have more AA and less NaOH, so NaOH is the limiting reactant.
NaOH + CH3COOH -> NaCH3COOH + H2O
start: 4.5 mmol, 8.75mmol, 0, n/a
change: -4.5 mmol, -4.5mmol, 4.5mmol, n/a
after rxn: 0, 4.25 mmol, 4.5mmol, n/a
Now your HH equation
pKa + log(conjugate base/acid) = 4.75 + log(4.5x10^-3 / 4.25x10^-3) =
pH = 4.76
What is Henderson-Hasselbalch equation?The Henderson-Hasselbalch equation in chemistry and biology connects the pH of a weak acid solution to its acid dissociation constant, Ka, and the ratio of the concentrations of the acid and its conjugate base in equilibrium.
When both the pH of the solution and the ratio of ionized to unionized forms are known, the Henderson Hasselbalch equation can be used to calculate the pKa.
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What of the following of density is true. a density is measured in grams. density is mass per unit volume. density is measured is millimeters density is a chemical property
2. In a chemical reaction, what do we call the original substances?
3. In a chemical reaction, what do we call newly made substances?
4. What are the three common states of matter?
5. If the mass of all the reactants in a chemical reaction is 100g, what will the mass
of all the products be?
Answer:
2. Reactants
3. Products
4. Solid, Liquid, Gas
5. 100g
Calculate the mass fraction of sodium chloride in the solution if 20 g of it is dissolved in 300 ml of water.
Solve with explanation! Given: Solution:
The mass fraction of sodium chloride is 0.0625
What is the mass fraction of sodium chloride in the solution?The mass fraction of sodium chloride is the ratio of the mass of sodium chloride to the total mass of the solution.
The mass fraction of sodium chloride is determined as follows;
mass of sodium chloride = 20 g
mass of water = volume * densitydensity of water = 1 g/mL
volume of water = 300 mL
mass of water = 300 mL * 1 g/mL
mass of water = 300 g
total mass of solution = 20 + 300 = 320 g
mass fraction of sodium chloride = 20/320
mass fraction of sodium chloride = 0.0625
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Is flour homogeneous or heterogeneous mixture?
Answer:
Flour is heterogeneous mixture.
Explanation:
Because you can see the different parts of the mixture,And they're normally not uniformly mixed.
Please Answer asap!!!
Answer:
The second one
Explanation:
It the graph is correct, it has the most nuetrons
If the initial concentration of so2cl2 is 0.150 m what is the concentration of so2cl2 after 220 s?
After 210 seconds, 0 e(- kt) = [SO2Cl2]0 (1 - e(- kt)) starting with 0.150M of [SO2Cl2]
[SO2]= 0.150M (1 - e) (1.48 104s 1 000 240 s)
What is concentration of a solution?
The quantity of a solute in a solvent is what we refer to in chemistry as the concentration of a solution. We refer to a solution as being concentrated when there is more solute present. Conversely, we refer to a solution as being diluted when it contains more solvent.
Utilize the integrated first order rate law, which provides the reactant sulfuryl chloride concentration as a function of time t:
([SO2Cl2]0 is the initial concentration, and k is the rate constant.) ln[SO2Cl2] = ln[SO2Cl2]0 - kt. [SO2Cl2] = e[ln[SO2Cl2]0 - kt] = e[ln[SO2Cl2]0] e(- kt) = [SO2Cl2]0 e(- kt)
The chemical equation SO2Cl2 SO2 + Cl2 describes how SO2Cl2 breaks down.
As a result, one mole of sulphur dioxide is produced for every mole of sulfuryl chloride that was lost. The relationship between these chemicals' concentration variations is as follows:
-[SO2Cl2] = [SO2] -
[SO₂Cl₂]
[SO2Cl2] - [SO2] = [SO2] - [SO2]0.
If there wasn't any sulphur dioxide at first, the concentration is as follows:
"SO2" = "SO2Cl2"
[SO2Cl2] = 0 - [SO2Cl2]
₀ - [SO₂Cl₂]
After 210 seconds, 0 e(- kt) = [SO2Cl2]0 (1 - e(- kt)) starting with 0.150M of [SO2Cl2]
[SO2]= 0.150M (1 - e) (1.48 104s 1 000 240 s)
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A 1.20 g sample of an unknown has a volume of 1.73 cm^3. what is the density of the unknown?
The sample density is 690 kg/m³.
We need to know about the density to solve this problem. Density is a unit that measures how dense an object is. Density can be measured by dividing mass by volume. It can be written as
ρ = m / V
where ρ is density, m is mass and V is volume
From the question above, we know that
m = 1.20 gram
V = 1.73 cm³
By substituting the following parameters, we get
ρ = m / V
ρ = 1.2 / 1.73
ρ = 0.69 g/cm³
Convert to SI unit (kg/m³)
ρ = 0.69 g/cm³
ρ = 0.69 x 10¯³ kg/ 10¯⁶ m³
ρ = 690 kg/m³
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Calculate the molality of each of the following aqueous solutions. (a) 4.10 m kcl solution (density of solution = 1.09 g/ml) m (b) 41.7 percent by mass nabr solution.
(a) The molality of KCl solution is 5.23 m.
(b) The molality of NaBr solution is 6.95 m.
(a) c = 4.10 M; concentration of the solution
d = 1.09 g/ml; density of KCl solution
M(KCl) = 74.55 g/mol; molar mass of the solute
b = 1000×c /1000×d - c×M(KCl)
b = 1000 × 4.1 M / 1000 × 1.9 - 4.1 × 74.55
b = 5.23 mol/kg; molality of KCl solution
(b) ω(NaBr) = 0.417; percent by mass
m = 1.0 kg; mass of the solution
m(NaBr) = 417 g; mass of the solute
n(NaBr) = 417 g ÷ 102.9 g/mol
n(NaBr) = 4.05 mol; amount of the solute
m(H₂O) = 0.583 kg; mass of water
b = n(NaBr) ÷ m(H₂O)
b = 4.05 mol ÷ 0.583 kg
b = 6.95 mol/kg; molality of NaBr solution
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The electron configuration of Carbon is 1s²2s²2p² and Nitrogen is 1s²2s²2p³.
How are the electron configurations of carbon and nitrogen different?
(1 point)
O Carbon has more electrons in its p orbital.
O The electron configurations are the same.
O Carbon has more electrons in its s orbital.
O Nitrogen has more electrons in its p orbital.
Recall that there is restricted rotation around carbon-carbon double bonds. Maleic acid and fumaric acid are two isomers with vastly different physical properties and pka values for loss of both protons. Explain why each of these differences occurs.
The molecular formulas of maleic and fumaric acids are identical, but fumaric acid is a trans isomer while maleic acid is a cis isomer. The two acids have different physical properties even though they have the same molecular structure.
The melting point of fumaric acid is higher than that of maleic acid. In this case, polarity is much less critical than intermolecular hydrogen bonding in determining the relative stability of the crystal lattice and, consequently, the melting temperature of both acids. The carboxyl groups in fumaric acid can hydrogen bond with their neighbors, whereas the carboxyl groups in maleic acid form an intramolecular hydrogen bond. It requires more effort to break the bonds in the trans isomer than in the cis isomer because of the efficient packing structure of fumaric acid. Since fumaric acid has strong intermolecular forces, its melting point is higher.
The cis configuration, dipole-dipole interaction, and hydrogen bonding of the molecule make maleic acid polar, which makes it soluble in water. Because water is also polar, it can dissolve quickly in it. Fumaric acid is a non-polar molecule, but is not very soluble in water, despite the instantaneous induced dipole that the London Dispersion forces have for the molecule.
After losing the H⁺ ion, malic acid's cis isomer can create intramolecular H bonds, which makes the conjugate base more stable than the trans form (Fumaric acid).
Maleic acid has a higher tendency to lose H⁺ than fumaric acid because intramolecular H-bonding stabilizes the conjugate base by H-bonding, as shown in the first and second figures of the image given below:
Because maleic acid contains intramolecular H-bonding, fumaric acid has a lower pKa₂ than maleic acid when the second H is taken out.
As the acidity rises, the value falls because pKa is the negative logarithm of Ka. Maleic acid has a higher initial dissociation constant than fumaric acid as a result of stable conjugate base synthesis, which increases the former's acidity. Due to the structures of the singly dissociated ions, fumaric acid undergoes the second dissociation more quickly. Fumaric acid is a simple two distinct carboxylate group that dissociates relatively separately.
Maleic acid, on the other hand, only undergoes one dissociation to form a more robust resonant ring structure. The remaining hydrogen can now alternately bond to the oxygen in positions 2 and 3 to form an alternating 3 Center bond because it is a 1,4 dicarbonyl with an alkene between those two positions. The alternating 3 Center bond creates a seven-part aromatic ring because an alkene is located next to it. The conjugate base of maleic acid is stabilized and has fewer acidity thanks to aromatic rings. Look at the image below, specifically the third number figure.
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Answer question 7. Circle the largest atom or ion in each grouping (I will give brainliest)
S, S^2-, Cl
Al, Al^3+, Mg
Sb, Se, Se^2+
Ca, K^1-, Ca^2+
Be^2+, Be, Na
According to the atomic radius, the largest atom or ion in each grouping are – [tex]S^2^-[/tex], [tex]Mg[/tex] , [tex]Sb[/tex] , [tex]Ca[/tex] , [tex]Na[/tex] .
A measure of the size of an atom is the atomic radius of a chemical element, which is normally the average distance between the core of the nucleus and the outermost isolated electron. There are several non-equivalent descriptions of atomic radius since the border is not a clearly defined physical object.
Since the net nuclear charge steadily rises as a result of higher electron attraction to the nucleus, the radius of atoms decreases across a period. However, as the number of shells in each atom grows along the group, the atomic radius increases.
Neutral atoms typically become larger down a group and smaller across a period. The radius of a neutral atom increases or decreases as it acquires or releases an electron, becoming an anion or cation, respectively.
In the given groupings, the size of the atoms and ions according to the atomic radius is as follows:
[tex]S^2^- > S > Cl[/tex]
[tex]Mg > Al > Al^3^+[/tex]
[tex]Sb > Se^2^- > Se[/tex]
[tex]Ca > K^+ > Ca^2^+[/tex]
[tex]Na > Be > Be^2^+[/tex]
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How many amperes are required to deposit 0.229 grams of lead metal in 802 seconds, from a solution that contains pb2 ions .?
0.265 amperes are required to deposit of lead metal.
m(Pb) = 0.229 g; mass of lead metal
t = 802 s; time of the reaction
n = 2; number of moles electron involved in electrolysis
F = 96485 C/m; the Faraday's constant
M(Pb) = 207.2 g/mol; the molar mass of the lead
Electrolysis is a chemical methode that uses electric currents for chemical reactions.
To solve this problem, we need Faraday's law of electrolysis:
I = m×n×F / t×M
I = 0.229 g × 2 × 96485 C/m / 802 s × 207.2 g/mol
I = 0.265 A, the current
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When comparing 2 hydrocarbons, why would the larger, higher molecular weight molecule have a higher melting point?
When comparing two hydrocarbons, the larger, higher molecular weight molecule would have a higher melting point due to greater amounts of dispersion forces.
What are hydrocarbons?Hydrocarbons are organic compounds made up of only carbon and hydrogen. They are non-polar molecules; therefore, they do not have partial charges or hydrogen bonds. The only form of intermolecular attraction between them are dispersion forces.
What are dispersion forces?Dispersion forces are the weakest type of intermolecular forces. They exist in non-polar molecules and gases like neon, hydrogen gas and oxygen gas. It is formed by the attraction between electrons and the nucleus.
Hydrocarbons with higher molecular weights have more electrons surface area than hydrocarbons with lower molecular weights. This causes the dispersion forces between the molecules to increase, thereby causing an increase in boiling point.
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A hypothesis is _____
A: a law
B: an educated guess
C: a fact
D: always proven
I think it's the D because you should prove it
The number of radioactive nuclei in a particular sample decreases to one-eighth of its original number in 9 days. what is the half-life of these nuclei?
The number of radioactive nuclei in a particular sample decreases to one-eighth of its original number in 9 days. The half-life of these nuclei is 3 days.
According to radioactive decay law,
n(t) = No [tex]e^{-kt}[/tex]
where n is number at t and No is starting number
when t = 9, n/No = 1/8 = 0.125
so
0.125 = [tex]e^{-k9}[/tex]
ln 0.125 = -9 k
k = 0.231
So,
half life = [tex]t\frac{1}{2}[/tex] = 0.693/k
half life = [tex]t\frac{1}{2}[/tex] = 0.693/0.231
half life = [tex]t\frac{1}{2}[/tex] = 3days
Therefore, when the number of radioactive nuclei in a particular sample decreases to one-eighth of its original number in 9 days. The half-life of these nuclei is 3 days.
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When water dissolves a substance, weak charges on water molecules attract oppositely charged portions of the substance, pulling them out into solution. Which property of water accounts for this occurrence?.
Answer:
When water dissolves a substance, the water molecules attract and “bond” to the particles (molecules or ions) of the substance causing the particles to separate from each other. The “bond” that a water molecule makes is not a covalent or ionic bond. It is a strong attraction caused by water’s polarity.
Explanation:
A cup of coffee contains 87.2 mg of caffeine. how many grams is this?
Answer:
0.0872g
Explanation:
Since mg is smaller than g, you will have to multiply the mg by milli which is equal to 10⁻³.
87.2 × 10⁻³ = 0.0872 grams
A cup of coffee contains 87.2 mg of caffeine. The number of grams present in the cup of coffee is 0.0872g.
What are grams and milligrams?Grams and milligrams are the measurement units that measure the amount or quantity of matter. It measures the solid mass and the quantity of matter. It is the SI unit of mass. There are seven units of measurement.
These units are Length - meter (m), Temperature - kelvin (K), amount of substance - mole (mole), Luminous intensity - candela (cd), Electric current - ampere (A), Mass - kilogram (kg), Time - second (s).
Here the mass of caffeine is asked in grams, which are given in milligrams.
As we know, 1 gram is = 1000 milligrams.
0.0872g = 87.2 mg
Thus, the number of grams present in the cup of coffee is 0.0872g.
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How many positional isomers of nonene are there? (consider only linear compounds, not branched isomers.)
a. 2
b. 3
c. 4
d. 5
e. 6
Option c is correct. If we only look at linear compounds and overlook branched isomers, nonene has 4 positional isomers.
Nonene is an with the molecular formula C₉H₁₈. Many structural isomers are possible, depending on the location of the C=C double bond and the branching of the other parts of the molecule. In general, nonene has 35 positional isomers if we also consider branched isomers but the demand of the question is only regarding linear compounds, so that's why the answer is four.
The most essential nonenes are propene trimers such as tripropylene. Generally, the mixture of branched nonenes is used in the alkylation of phenol to produce nonylphenol, a precursor to detergents.
What exactly are positional isomers?
Positional isomers are constitutional isomers that share the same carbon skeleton and functional group. They differ in the location of the functional groups on the carbon chain.
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Checkout the attached image here :
when the body is able to keep balance. some examples include getting more oxygen when needed and getting a fever to kill of viruses.
yin
triple beam
Homeostasis
yang
Answer: Homeostasis
Explanation: Homeostasis refers to stable equilibrium in the body. It is the condition of optimal functioning for a living organism, where no part of the body has excess stress put upon it. Some more examples of homeostasis include maintaining normal body temperature and blood sugar levels.
Answer:
Homeostasis
..・ヾ(。＞＜)シ
3.
sublimation, condensation, evaporation,
boiling, melting, freezing
Classify the above processes into two
groups: heat taken in and heat given out
by the particles.
Answer:
sublimation:heat taken in
condensation:heat given out
evaporation:heat taken in
boiling:heat taken in
melting:heat taken in
freezing:heat given out
Processes listed can be classified into two groups based on whether heat is taken in or given out by the particles.Heat is taken in melting,evaporation, sublimation while heat is given out in boiling,condensation and freezing.
Heat taken in by the particles:
1. Sublimation: This process occurs when a substance changes from a solid directly to a gas without passing through the liquid phase. Heat is absorbed to break the intermolecular forces holding the particles in the solid phase.
2. Evaporation: This process happens when a liquid changes into a gas at temperatures below its boiling point. Heat is absorbed from the surroundings to overcome the intermolecular forces between the liquid particles.
3. Melting: Melting occurs when a solid substance changes into a liquid. Heat is absorbed to break the intermolecular forces holding the particles in the solid phase.
Heat given out by the particles:
1. Condensation: Condensation occurs when a gas changes into a liquid. Heat is released to the surroundings as the gas particles lose energy and come together to form liquid droplets.
2. Boiling: Boiling is the process where a liquid changes into a gas throughout its entire volume. Heat is released to the surroundings as the liquid particles gain energy and escape the liquid phase.
3. Freezing: Freezing is the process where a liquid changes into a solid. Heat is released to the surroundings as the liquid particles lose energy and arrange themselves into a regular pattern.
Thus, heat is taken in melting,evaporation, sublimation while heat is given out in boiling,condensation and freezing.
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Write a balanced half-reaction for the reduction of permanganate ion to manganese ion in acidic aqueous solution. be sure to add physical state symbols where appropriate.
The balanced half reaction for reduction of the permanganate ion, to manganese ion, is shown below:
[tex]MnO_{4^{-} }[/tex] + 8[tex]H^{+}[/tex] + 5e- → [tex]Mn^{2+}[/tex] + [tex]H_{2} O[/tex]
What is half reaction?The portion of an overall reaction that represents either an oxidation or a reduction separately is known as a half-reaction.
A redox reaction can only be fully described by two half-reactions, one oxidation and one reduction.
The chemical compound that contains the manganate (VII) ion is known as permanganate. Because manganese is in the +7 oxidation state and is rapidly reduced and oxidised by other elements, the permanganate(VII) ion is a potent oxidising agent.
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Which one of the following substances will give an aqueous solution of ph < 7?
(a) na2co3
(b) ch3coona
(c) ki
(d) ch3oh
(e) nh4br
The substance that will give an aqueous solution of pH < 7 is (e) NH₄Br.
a) Balanced chemical equation for the reaction of sodium carbonate with water: Na₂CO₃ + 2H₂O → 2NaOH + H₂CO₃
Hydrolysis of this salt gives strong base (NaOH) and weak acid (H₂CO₃), so pH is greater than 7
b) Hydrolysis of sodium acetate gives strong base (NaOH) and weak acid (CH₃COOH), so pH is greater than 7
c) Hydrolysis of potassium gives strong base (KOH) and strong acid (HI), so pH is equal to 7
d) Methanol is neutral, pH is equal to 7
e) Hydrolysis of ammonium bromide gives weak base (NH₄OH) and strong acid (HBr), so pH < 7.
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What is the mass of an object that requires a force of 25 N to accelerate at 5 m/s/s?
An object with a mass of 5 kg requires a force of 25 N to accelerate at 5 m/s/s.
Force is described as the amount of energy need to move an object, either push or pull. For an object of constant mass, force is equal to the product when you multiply mass and its acceleration.
F = ma
where F = force (N or kg m/s^2)
m = mass (kg)
a = acceleration (m/s^2)
If an object requires a force of 25 N (= 25 kg m/s^2) to accelerate at 5 m/s/s, the using the formula F = ma, solve for its mass.
F = ma
25 N = 5 m/s/s (m)
25 kg m/s^2 = 5 m/s/s (m)
25 = 5m
m = 5 kg
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Which one of the following substances would be the most soluble in cyclohexane, c6h12? nano3 ch3ch2oh c5h12 hi nh3
The solvent that is most soluble in it will be nonpolar C4H10.
What is nonpolar?In chemistry, polarity is the separation of electric charge, which causes a molecule or its chemical groups to have an electric dipole moment, with a negatively charged end and a positively charged end.
Due to a difference in electronegativity between the bound atoms, polar molecules must have one or more polar bonds. If the bond dipoles cancel each other out through symmetry, molecules with polar bonds have no molecular polarity.
Dipole-dipole intermolecular forces and hydrogen bonding are two ways that polar molecules communicate with one another. Surface tension, solubility, melting and boiling points, as well as other physical characteristics, are all governed by polarity.
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What is the net force and direction of the car?
Answer:
Explanation:
The net force is 10-7= 3N and the car moves in the direction of the greater force applied i.e. towards the green arrow or the right side
What is the concentration of [h ] in molars, millimolars, and micromolars for a solution of ph 5?
concentration of [h +] in molars millimolars, and micromolars for a solution of ph 5
molar concentration of [H +] = 10^(-5)M
concentration of [H +] in millimolar = 10^(-8)milliM
concentration of [H +] in micromolar = 10^(-11)microM
What is molars, millimolar and micromolar?
The term "molar" describes the moles per litre of a solution, which is the unit of concentration molarity. The phrase is most frequently used in chemistry to refer to a solute's molar concentration in a solution. Molar concentration is measured in mol/L or M.
A millimolar is a unit used to quantify molar concentration. It is a multiple of unit molar generated from SI that is frequently stated as 10 -3 molar.
A measuring unit for molar concentration is called a micromolar. It is a multiple of unit molar generated from SI that is frequently stated as 10 -6 molar.
pH = -log 10 [H +]
Thus, molar concentration of [H +] = 10^(-5)M
concentration of [H +] in millimolar = 10^(-8)milliM
concentration of [H +] in micromolar = 10^(-11)microM
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