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A- What is the pH of a buffer prepared by adding 0.405 mol of the weak acid...

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Chemistry

A-

What is the pH of a buffer prepared by adding 0.405 mol of theweak acid HA to 0.305 mol of NaA in 2.00 L of solution? Thedissociation constant Ka of HA is 5.66×10−7.

Express the pH numerically to three decimal places.

B-

What is the pH after 0.150 mol of HCl is added to the bufferfrom Part A? Assume no volume change on the addition of theacid.

Express the pH numerically to three decimal places.

C-

What is the pH after 0.195 mol of NaOH is added to the bufferfrom Part A? Assume no volume change on the addition of thebase.

Express the pH numerically to three decimal places.

Answer & Explanation Solved by verified expert
3.7 Ratings (316 Votes)
A Ka 566107 pKa log Ka log566107 6247 use pH pKa log conjugate baseacid 6247 log 03050405 6124 Answer 612 B mol of HCl added 015 mol A will react with H to form HA Before Reaction mol of A 0305 mol mol of HA 0405    See Answer
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