what is freshly prepared FeSO4 used in the brown ring test​

Answers

Answer 1

Answer:

Freshly prepared ferrous sulphate is used in brown ring test, because if FeSO4 is stored or it is the old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown-yellow coating of basic ferric sulphate, which is an adduct of ferric oxide and ferric sulphate

Answer 2

HEYA FRIEND

.

.

HERE'S YOUR ANSWER

.

.

.

.

It is used in brown ring test because , if Fe2So4 is stored or it is old one then it reacts with atmospheric oxygen and gets oxidized to form a corrosive brown yellow coating of basic ferric sulphate , which is an adduct of ferric oxide and ferric sulphate.

.

✌✌✌

HOPE IT WILL HELP YOU UP

.

.

KATË


Related Questions

In which state of matter does heat travel fastest and slowest?

Answers

Answer:

Heat travels faster in solids.

Heat travels slower in gases.

Explanation:

The state of matter in which heat travels in fastest way is solid and in gaseous state heat travels in slowest way.

What is heat transfer?

Heat transfer is a process in which heat can travel from one body to another body or from high temperature to low temperature.

In solid state heat will travel in the fastest way because molecules are arranged very close to each other and heat will travel through conduction process. And in gaseous state heat will travel with slowest way as molecules are arranged in very distance.

Hence in solid, heat travels in fastest way and in gases heat travels in slowest way.

To know more about heat conduction, visit the below link:

https://brainly.com/question/1121702

what is the atomic number of silver​

Answers

Answer:

47

Explanation:

Silver (Ag), chemical element, a white lustrous metal valued for its decorative beauty and electrical conductivity. Silver is located in Group 11 (Ib) and Period 5 of the periodic table

The atomic number of silver is 47.

That also means that silver has 47 electrons and 47 protons.

The atomic mass of silver is 108u.

107 - 47 = 60

Silver has 60 neutrons.

How many liters of hydrogen gas is produced from 3.712 g of magnesium with 104.2ml of 1.385 mol/L HCL (aq) at SATP? Please show your work and explain it. I really need help with this question, it's on one of my quizzes.

Answers

Answer:

[tex]V=1.61L[/tex]

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

[tex]Mg+2HCl\rightarrow MgCl_2+H_2[/tex]

Next, we compute the reacting moles of each reactants:

[tex]n_{Mg}=3.712gMg*\frac{1molMg}{24.305 gMg}=0.153molMg[/tex]

[tex]n_{HCl}=1.385\frac{molHCl}{L}*0.1042L=0.144molHCl[/tex]

Then, as magnesium and hydrohloric acid are in a 1:2 molar ratio 0.153 moles of magnesium will completely react with 0.306 moles of hydrochloric acid yet we only have 0.144 moles, therefore, limiting reactant is hydrochloric acid. Thus, we compute the produced moles of hydrogen:

[tex]n_{H_2}=0.144molHCl*\frac{1molH_2}{2molHCl} =0.072molH_2[/tex]

Finally, we use the ideal gas equation with T=298K and 1atm (STP conditions) to compute the liters of hydrogen gas:

[tex]PV=nRT\\\\V=\frac{nRT}{P}=\frac{0.072mol*0.082\frac{atm*L}{mol*K}*273K}{1atm}\\ \\V=1.61L[/tex]

Best regards.

9.0 L of a gas at 25 oC expands to a volume of 25.0 L. What is the resulting temperature in Kelvin?

Answers

Answer:

Explanation:

H

Write down as many as you can uses for liquid crystall

Answers

Answer:

The most important use of liquid crystals is in displays because the molecules of a liquid crystal can control the amount, color, and direction of vibration of the light that passes through them. hope that helps love!

It can control the color and specific amount

PLZZZZZZZZ HELLLLLLLLLLLLLLLLLPPPPPP!!!!! soo stuckkkkk

Answers

Hey I’m going on a date

What is meant by “normal” when you are asked for normal boiling and melting points?

Answers

Answer:

Normal boiling point is the temperature at which a liquid boils at 1 atmosphere of pressure.

Explanation:

what is the mass of 3.01x1023 atoms of iron(atomic mass of fe=56)

Answers

Answer:

N = n× l

N = number of entities

n= moles

l = Avogadro's constant = 6.023 × 10^23

3.01 × 10^ 23 = n * 6.023 × 10^23

n = 3.01 × 10^23/6.023 × 10^23

n= 0.5moles

Molar mass = mass/ number of moles

Molar mass = 56

mass = 56 × 0.5

= 28g

Hope this helps.

When naming acids, the term “hydro” is used then there are or are not (pick the correct one) any oxygens.

Answers

Answer:

There are no oxygen

Explanation:

Hydro is used when naming hydrogen compound and oxo is used when naming oxygen compound

In an electrolytic cell, which ion would migrate
through the solution to the negative electrode?
(1) a chloride ion
(3) a bromide ion
(2) a silver ion
(4) a fluoride ion

Answers

Answer:

Silver ion

Explanation:

In an electrolytic cell, the positive ions known as the cations migrate to the negative electrode, the cathode where they accept electrons to become discharged as neutral atoms. Also, the negative ions known as the anions migrate to the positive electrode, the anode, where they give up their electrons to become discharged as neutral atoms.

From the question above, the only positive ion among the options given is the silver ion, Ag+, therefore, it is the correct option.

What is h2OO??????????

Answers

The answer is : H2O is water

how many electrons does phosphorus need to gain to have a stable outer electron shell
1
2
3
4​

Answers

Answer:

3

Explanation:

Phosphorous valence is 5. so to get stable electronic configuration it has to gain 3 more electrons to its outer shell

Answer:

3

Explanation:

luckily, every phosphorus atom is looking to gain 3 electrons. It's a perfect match. But something to notice though, look how they have a bond with six electrons. That is called triple bond.

Someone please help me with the second question ONLY

Answers

Answer:

no

Explanation:

this experiment could not be replicated, because there are no specific measurements. the details would not be the same because it does not include the type of paper used nor the diameter, width or length. A guess of the measurements would be the only way to replicate this experiment but other then that, no you cannot.

Explain what environmental bias means. What are the categories that
make up environmental bias? How does environmental bias relate to
chemistry?

Answers

Answer: Environmental bias can be defined as the idea that suggests a group of people being living in the environment which is harmful for them.

Explanation:

There are three categories that make up the environmental bias there are socio-cultural choice, occupational choice, and personal choice.

The environmental bias can be related to chemistry as chemical lab is an area prone to chemical (acid, alkali) and fire so produced in reactions thus prone to accidental hazards not safe for working of people. But people like to work in chemical lab due to their personal and occupational choice.

Draw an alkyl bromide with proper stereochemistry that can be used to synthesize the given alkene as the exclusive product via an e2 reaction.

Answers

Answer:

See explanation below

Explanation:

You forgot to put the picture to do so. In this case, I manage to find one, and I hope is the one you are looking for. If not, then post it again and I'll gladly help you out again.

According to the picture with the answer, we have a cyclohexane with 4 methyl groups there. Two of them are facing towards the molecule with a darker bond. This means that the alkyl bromide, should have a bromine in one of the bonds, and in order to produce an E2 reaction, this bromine should be facing in the opposite direction of the methyl groups which are facing towards. This is because an E2 reaction occurs with the less steric hindrance in the molecule. If the bromine is in the same direction as the methyl group, it will cause a lot more of work to do a reaction, and therefore, an E2 reaction. I will promote instead a E1 or a sustitution product.

Therefore the alkyl bromide should be like the one in the picture 2.

This is how fluorine appears in the periodic table. A green box has F at the center and 9 above. Below it says fluorine and below that 19.00. A blue arrow points to 9. What information does "9” give about an atom of fluorine? Select three options. the atomic number the atomic mass the number of protons the number of electrons the number of neutrons

Answers

1. Atomic weight of fluorine

2. Number of proton and neutrons found in the nucleus of the element

3. And every number uniquely identifies each of the the elements

Ill give the brainliest answer to whoever helps me with this equation

Answers

Answer: The percent yield for the [tex]NaBr[/tex] is, 86.7 %

Explanation : Given,

Moles of [tex]FeBr_3[/tex] = 2.36 mol

Moles of [tex]NaBr[/tex] = 6.14 mol

First we have to calculate the moles of [tex]NaBr[/tex]

The balanced chemical equation is:

[tex]2FeBr_3+3Na_2S\rightarrow Fe_2S_3+6NaBr[/tex]

From the reaction, we conclude that

As, 2 moles of [tex]FeBr_3[/tex] react to give 6 moles of [tex]NaBr[/tex]

So, 2.36 moles of [tex]FeBr_3[/tex] react to give [tex]\frac{6}{2}\times 2.36=7.08[/tex] mole of [tex]NaBr[/tex]

Now we have to calculate the percent yield for the [tex]NaBr[/tex].

[tex]\text{Percent yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100[/tex]

Experimental yield = 6.14 moles

Theoretical yield = 7.08 moles

Now put all the given values in this formula, we get:

[tex]\text{Percent yield}=\frac{6.14mol}{7.08mol}\times 100=86.7\%[/tex]

Therefore, the percent yield for the [tex]NaBr[/tex] is, 86.7 %

The picture compound has which bond?

Answers

Answer:

There are C - C  bonds and C - H bonds.

trust me! I took a test with this question and got 100! :)

Explanation:

how much volume do the gas molecules take up in an inflated balloon

Answers

Answer:

The volume of a gas is determined by the volume of the container it is in. Gases take the shape of their container and the volume of the container....

Explanation:

What happens to the volume or size of a balloon as it rises in the air?

When a balloon goes up higher in the air, its size will increase. Since there's less air in the upper atmosphere, there's less stuff pushing back on the balloon, and hence the pressure is lower, which allows the balloon to expand.

Is pressure inside a balloon greater?

The pressure inside the balloon is higher than the pressure on the outside. ... And the direction of airflow is always from higher to lower pressure. If the pressure was same then there would be no airflow and if the pressure outside was higher , air will flow from outside to the inside of the balloon.

What is the relationship between volume and pressure?

Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa, when temperature is held constant. Therefore, when the volume is halved, the pressure is doubled; and if the volume is doubled, the pressure is halved.

Mark as brainliest if liked it. Thanks hope this helps

It depends on how many volume the container is in

example of potassium salt​

Answers

Answer:

1) Sodium Chloride

2) Potassium Dichromate

3)Calcium Chloride

4)Sodium Bisulfate

Explanation:

Ex:1) Sodium chloride (NaCl) is the most common type of salt in our lives. Known as table salt, it forms a cubic lattice when it's in solid form. It's one of the safest materials you can use in a chemistry class or kitchen.

Ex:2) Potassium dichromate (K2Cr2O7) is an orange-colored salt composed of potassium, chromium and oxygen. Not only is it toxic to humans, it's also an oxidizer that is a fire hazard. Potassium dichromate should never be thrown away. Instead, it should be washed down the drain with a lot of water. Always use rubber gloves when working with this compound. If you spill a potassium dichromate solution on your skin, it gives you a chemical burn. Keep in mind that any compound with chromium in it is a potential carcinogen.

Ex:3)Calcium chloride (CaCl2) resembles table salt in its white color. It is widely used to remove ice from roads. It's more effective than sodium chloride as a deicer, because calcium chloride produces three ions, while calcium chloride produces only two. Calcium chloride can melt ice down to minus 25 F, as much as 10 degrees lower than for sodium chloride. Calcium chloride is so hygroscopic, which is the ability to absorb water, that if you leave it in a room uncovered, it can absorb enough water from the air to dissolve into a solution all on its own.

Ex:4) Sodium bisulfate (NaHSO4) forms from sodium, hydrogen, sulfur and oxygen. It is created from sulphuric acid and retains one of the acid's hydrogen ions, which gives this salt acidic qualities. Known as a dry acid, sodium bisulfate is used in commercial applications, such as reducing the pH level of spas and swimming pools, washing concrete and cleaning metals. In its solid form, sodium bisulfate forms white beads. This salt is poisonous and can damage your skin, so use rubber gloves when handling it. If ingested, call the poison control center immediately and do not induce vomiting.

What is the pH of a 6.4x10^-10 m OH- solutions

Answers

Answer:

pH: 4.80617997398

pOH: 9.19382002602

[H+]: 1.5625E-05

[OH-]: 6.4E-10

ACID

Hope it helps :)

Convert to standard notation.
8.127 x
10-4

Answers

Move the decimal to the left of the number if the number is negative 10-4
If its positive to the right

Answer 0.0008127

Answer:

0.0008127

Explanation:

This is easy

an 80kg skateboard moving at 3m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is her change in kinetic energy as a result

Answers

640 is correct I just took the test

Geetha took some grains of boiled rice in test tube A and Tina took boiled and chewed rice in test tube B. Both of then poured 1-2 drops of iodine solution into the test tubes. What would they have observed? Give a reason for your answer.

Answers

Answer:

Test tubes A and B turn a darker blue color.

Explanation:

Based on the information provided in the question it can be said that they should have noticed that Tube A and Tube B turned a dark blue color. This is because the starch turns the solution in the test tubes into a dark blue color due to the negative reaction caused by the conversion of starch present in salivary amylase

During chemical reactions the bonds between atoms break and new bonds form.

Energy must be absorbed to break a bond, so breaking bonds is endothermic.

Making new bonds is exothermic because energy is released.

a) When green copper carbonate decomposes, the equation is:












CuCO3 CuO CO2

copper carbonate copper oxide carbon dioxide


Is the reaction exothermic or endothermic? Use ideas about bonds to explain why.

Answers

Answer:

The equation is CuCO₃ ⇆ CuO + CO₂. So it's a decomposition reaction, so a solid broke down into two other substances. This means that bonds were broken, so the reaction must be endothermic.

Compare the wavelength and energy of ultraviolet rays to visible light

Answers

Answer:

Visible wavelengths range from 0.0007 milimeters for red light, through orange, yellow, green, and blue, to 0.0004 milimeters for violet light.

Ultraviolet is shorter wavelengths than violet.

Hope This Helps.

what is the symbol for Lithium, Iron, and Helium

Answers

Lithium=li

Iron=Fe

Helium=He

I don't say u must have to mark my ans as brainliest but if u think it has really helped u plz don't forget to thank me....

Answer:

lithium symbol=li helium= he and iron =i

what is the best way to make a supersaturated solution?
A. cool the solution
B. Stir the solution
C. Heat the solution
D. Evaporate the solution

Answers

To make a supersaturated solution, make a saturated solution of sugar by adding 360 grams of sugar to 100 mL of water at 80 degrees Celsius. When the water cools back down to 25 degrees, that 360 grams of sugar will still be dissolved even though the water should only dissolve 210 grams of sugar.

C.heat the solution

A.
B.
C.
D.

what could be the correct answer? Help me please

Answers

Answer:

A

Explanation:

Answer:

a

Explanation:

If a gas at 35°C and 2.3 atm is heated to 50°C, then what will the new pressure be? (Gay Lussac's Law)
Remember to convert Celsius tempertature into Kelvin. (Take the Celsius values and add 273)

Answers

Answer:

THE NEW PRESSURE OF THE GAS AT 50 °C IS 2.41 atm.

Explanation:

Initial temperature = 35 °C = 35 + 273 K= 308 K

Final temperature = 50 °C =50 + 273 K = 323 K

Initial pressure = 2.3 atm

Final pressure = unknown

Using the combined gas equation to get the relationship between pressure and temperature for a given gas sample, we have;

P1 / T1 = P2 / T2

P2 = P1 T2 / T1

P2 = 2.3 * 323 / 308

P2 = 742.9 /308

P2 = 2.41 atm.

THE NEW PRESSURE IS 2.41 atm at 50 °C

Other Questions
The common stock and debt of Northern Sludge are valued at $62 million and $38 million, respectively. Investors currently require a 16.8% return on the common stock and a/an 7.2% return on the debt. If Northern Sludge issues an additional $21 million of common stock and uses this money to retire debt, what happens to the expected return on the stock? Assume that the change in capital structure does not affect the interest rate on Northerns debt and that there are no taxes. an elevator moves at a rate of -5.8 feet per second from a height of300 feet above the ground. the elevator takes 3 seconds to make its first stop.how many feet above the ground is the elevator now? Subtract 4x4 + 2x +5 from the sum of 2x4 - 4x23 and 3x4 - 3x +9. pleaseee help me w dis!!! marking brainiest!!! what is the quotient of x^2-9x+14/x-7 The bar graph shows the results of rolling a number cube (a die) 50 times. What is the probability of rolling an odd number? How does this compare with the theoretical probability of rolling an odd number?Experimental Probability. Theoretical ProbabilityP(odd) = % P(odd) = % Write an integer that represents this scenario: 18-point gain The chemical equation and thermodynamic data for the melting of tungsten are given above. Based on this information, which of the following provides the best predictions correc whether a sample of pure tungsten will melt at 3723 K? A. The sample will not melt because T > H/sB. The sample will not melt because T< H/s C. The sample will mel because T>D. The sample will mel because T (Minimum 300 words) Dr. Martin Luther King, Jr. said, " a riot is the language of the unheard. Do you agree or disagree? Where is this evident in history's past, and where is this evident today?(in 5 sentences) do this work change into suitable tag Use the discriminant to determine the number of real solutions to the quadratic equation. 11m2+12m+4=0 What is the number of real solutions? Select the correct answer below: 0 1 2 Line segment ON is perpendicular to line segment MLWhat is the length of chord ML?020 units24 units26 units30 units13P8MNMark this and return At the beginning of the Cultural Revolution a teenage boy together with his classmates paraded their teacher, an old man, through the streets. The boy kicked the teacher hard and broke his ribs. For the following years he was full of remorse and tried to make up for what he had done.Which words or phrases in the passage above help you understand the meaning of remorse?kicked the teacher hardtried to make up for what he had doneat the beginning of the Cultural Revolutionfor the following years HELP ME PLZ!!!In Tier 3, half of the shelf space will occupy Go Math Textbooks and the other half of the space with Bounty paper towels, as shown below. Your answer must have work on how you did it OR an explanation. What are the components of a research plan? Check all that apply.goals for the research projectresearch topicclass schedulepossible sourcesartwork ideasresearch method Calculate the radius of the circular rug. Use 3.14 for . Enter your answer in the box below.____ feet Use exponential smoothing with trend adjustment to forecast deliveries for period 10. Let alpha = 0.4, beta = 0.2, and let the initial trend value be 4 and the initial forecast be 200.Period- Actual Demand1- 2002- 2123- 2144- 2225- 2366- 2217- 2408- 2449- 25010- 266 Choose the equation of the graph shown below:y = |x - 1| - 3y = |x + 1| - 3y = |x - 1| + 3 In 450 BCE, Greek philosopher Democritus first thought of the existenceof tiny particles that compose everything around us. He named them'atomos', meaningA. InvisibleB. ParticleC. IndivisibleD. None of theseReset Selection