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What is the pH of a buffer solution that is composed of a weak acid, HA...

What is the pH of a buffer solution that is composed of a weak acid, HA (Ka=2.45×10–8), and the conjugate base, A–, after 2.71 mL of 0.135 M HCl solution is added. The initial concentrations of the 142 mL buffer solution are [HA]=0.7 M and [A–]=0.37 M. Enter your value to two (2) decimal places.

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Answer #1

It's a titration problem of an weak acid by addition of HCl to the buffer solution.

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