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Please answer all numerically with three demical places. :) A) What is the pH of a...

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Chemistry

Please answer all numerically with three demical places. :)

A) What is the pH of a buffer prepared by adding 0.405 mol ofthe weak acid HA to 0.609 mol of NaA in 2.00 L of solution? Thedissociation constant Ka of HA is 5.66×10−7.

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.

D) What is the pH after 0.195 mol ofNaOH is added to the buffer from Part A? Assume no volume change onthe addition of the base.

Answer & Explanation Solved by verified expert
4.3 Ratings (585 Votes)
A What is the pH of a buffer prepared by adding 0405 mol of the weak acid HA to 0609 mol of NaA in 200 L of solution The dissociation constant Ka of HA is 566107 Solution Using the Henderson equation we can calculate the pH of the buffer solution Initial molarity of the acid 0405 mol 20 L 02025 M    See Answer
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