What is the pH of a buffer prepared by adding 0. 809 mol of the weak acid HA to

Question

What is the pH of a buffer prepared by adding 0. 809 mol of the weak acid HA to 0. 305 mol of NaA in 2. 00 L of solution? The dissociation constant Ka of HA is 5. 66 x 10 - 7 Express the pH numerically to two decimal places. What is the pH after 0. 150 mol of HC1 is added to the buffer from Part A? Assume no volume change on the addition of the acid. Express the pH numerically to two decimal places. What is the pH after 0. 195 mol of NaOH is added to the buffer from Part A? Assume no volume change on the addition of the base Express the pH numerically to two decimal places.

Explanation / Answer

apply ph of salt of weak acid and srong base = Pka + log[salt]/[acid]

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