Will a buffer's pH increase, decrease, or be unchanged by the addition of pure DI water?...

Question

Question

Will a buffer's pH increase, decrease, or be unchanged by the addition of pure DI water? Explain.

Answer 1

Answer #1

Using Henderson-Hasselbalch equation

pH of buffer solution is

pH = pKa + log

When , Deionised (DI) water is added ratio of concentration of conjugate base and its acid will be same.

Hence, pH of the buffer will be unchanged by the addition of pure DI water.

Answer 2

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