chem

What is the pH ( 3 significant digits) of a 0.01 M solution of sulfuric acid? Hint is that the first ionization constant is "large", and the second is finite, and the [H+] donated by the second equilibrium depends upon the amount of [H+] already donated by the first ionization. What is the answer please.

For Further Reading

chemistry - DrBob222, Wednesday, March 26, 2008 at 1:29am
H2SO4 ==> H^+ + HSO4^-
HSO4^- ==> H^+ + SO4^-2

The first ionization is complete; i.e., it produces 0.01 M H^+.
The second ionization is not complete and obeys k2 = (H^+)(SO4^-)/(HSO4^-)

The easiest way to work the problem, I think, is to write the expression for k2, look up k2 for its value, then substitute as follows:
(H^+) = 0.01 + x
(SO4^-2) = x
(HSO4^-) = 0.01 - x
Then solve the quadratic for x.
Total (H^+) then is 0.01 + x.

The k2 value is 1.2 x 10^-2.. where exactly am I substituting that? can you show me how using that number.

For Further Reading

chemistry - Dr Russ, Wednesday, March 26, 2008 at 9:20am
DrBob has given you the equation to use:

k2 = [H^+][SO4^-]/[HSO4^-]

and the values to substitute

[H^+] = 0.01 + x
[SO4^-2] = x
[HSO4^-] = 0.01 - x
k2 = 1.2 x 10^-2

you need to substitute these and solve for x.

Remember that you are after 0.01+x [H^+]
to calculate the pH.

I got the answer of either 4.0 or 1.65.. but I don't know if it is right.. Can you refresh my memory on how to solve for x in this equation please.

  1. 👍
  2. 👎
  3. 👁

Respond to this Question

First Name

Your Response

Similar Questions

  1. Organic Chem

    A student prepares ethyl benzoate by the reaction of benzoic acid with ethanol using a sulfuric acid catalyst. The following compounds are found in the crude reaction mixture: ethyl benzoate (major component), benzoic acid,

  2. chemistry

    What is the mole fraction of sulfuric acid in a solution made by adding 3.4 grams of sulfuric acid to 3500 mL of water?

  3. math

    a chemistry experiment calls for 30% sulfuric acid solution. if the supply room has only 50% and 20% sulfuric acid solution on hand,how much of each should be mixed to obtain 12 litres of 30% solution?

  4. Gen Chem 1

    A tanker truck carrying 2.01×10^3kg of concentrated sulfuric acid solution tips over and spills its load. The sulfuic acid is 95.0% H2SO4 by mass and has a density of 1.84g/L. Sodium Carbonate (Na2CO3)is used to neutralize the

  1. chem

    which one of the following statements about sulfuric acid is correct? A. sulfuric acid is a known muriatic acid B. sulfuric acid is a strong oxidizing agent C. sulfuric acid has little effect on metals D. sulfuric acid is

  2. chm

    An aqueous solution that is 10.0 percent sulfuric acid (H2SO4) by mass has a density of 1.143 g/mL. Determine the molality of the solution. ( 3 significant figures)

  3. Chemistry

    1. A lab tech needs 1.00 L of 0.125 mol/L sulfuric acid solution for a quantitative analysis experiment. A commercial 5.00 mol/L sulfuric acid solution is available from a chemical supply company. Write out what steps he/she would

  4. Chemistry

    In an acid-base neutralization reaction 28.74 mL of 0.500 M potassium hydroxide reacts with 50.00 mL of sulfuric acid solution. What is the concentration of the H2SO4 solution? Please help with this question, thank you.

  1. chemistry

    calculate what volume of sulfuric acid solution(specific gravity=1.07;and containing 10%sulfuric acid by mass)contains 18.50g of pure sulfuric acid at a temperature of 25 Celsius.

  2. chem

    the balance equation for the reaction of aqueous sulfuric acid with aqueous ammonia is 2NH3(aq)+ H2SO4(aq) -> (NH4)2SO4(aq) 1. what volume of 0.250M sulfuric acid solution would be needed to react completely with 18.00mL of 0.350M

  3. chemistry

    A solution is 40% acetic acid by mass. The density of this solution is 1.049 g/mL. Calculate the mass of pure acetic acid in 170 mL of this solution at 20 C. Answer in units of g The density of a solution of sulfuric acid is 1.29

  4. Math

    A chemistry teacher needs 2.5 liters of a sulfuric acid solution that is 20% sulfuric acid and 80% water . He has 2 liters of a 15% sulfuric acid solutionleft over from earlier laboratory exercises. He also has 44 liters of a 50%

You can view more similar questions or ask a new question.