Last modified: Wed 12/31/1969 06:00:00 pm
BCE

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Answer all of the questions below. If you do not know an answer enter CNA. However, it will help me the most if you answer each question with your best intuition/idea about what would be a reasonable answer.

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1. H2S(aq) is a diprotic acid. Given a 0.100 M H2S solution, complete the ICE table below. NOTE: For the reaction the equation is for the first dissociation.

 

Reaction

H2S

H+

+ HS-

Initial

Change

Equilibrium

2. Ka1 for H2S is 5.7 x 10-8. Calculate [H+] produced from H2S.

[H+] = M

3. What is the [HS-] (at equilibrium) in the solution?

[HS-] = M

4. Complete the table below for the second dissociation HS-.

Reaction

HS-

H+

+ S2-

Initial

Change

Equilibrium

5. Ka2 for H2S is 1.3 x 10-13. Calculate [H+] produced from Question 4.

[H+] = M

6. What is the [H+] in a 0.100 M H2S solution?

[H+] = M

7. Is there anything about the questions that you feel you do not understand? List your concerns/questions.

8. If there is one question you would like to have answered in lecture, what would that question be?