Question

HA is a weak acid with a pKa value of 3.61 . What is the pH...

HA is a weak acid with a pKa value of 3.61 . What is the pH of a buffer solution that is 0.300 M in HA and 0.837 M in NaA? What is its pH after the addition of 12.7 g of HCl to 2.000 L of this buffer solution? Assume the volume remains fixed at 2.000 L. The temperature is 25oC.

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Answer #1

Soln:

The soln is based on the Henderson's buffer equation i.e.

pH = pKa + log [salt] / [acid]

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