Questions 1: A) Calculate the pH of a buffer solution that is 0.246 M in HCN...

Question

Question

Questions 1:

A) Calculate the pH of a buffer solution that is 0.246 M in HCN and 0.166 M in KCN. For HCN, Ka = 4.9×10⁻¹⁰ (pKa = 9.31).

B) Calculate the pH of a buffer solution that is 0.200 M in HC2H3O2 and 0.160 M in NaC2H3O2. (Ka for HC2H3O2 is 1.8×10−5.)

C) Consider a buffer solution that is 0.50 M in NH3 and 0.20 M in NH4Cl. For ammonia, pKb=4.75.

Calculate the pH of 1.0 L of the original buffer, upon addition of 0.020 mol of solid NaOH.

D) A 1.0-L buffer solution contains 0.100 mol HC2H3O2 and 0.100 mol NaC2H3O2. The value of Ka for HC2H3O2 is 1.8×10−5

Calculate the pH of the solution, upon addition of 0.015 mol of NaOH to the original buffer.

Answer 1

Answer #1

Answer 2

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