A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution....

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Question

A 20.0 mL sample of 0.687 M HBr is titrated with a 0.216 M NaOH solution. The pH after the addition of 10.0 mL of NaOH is __________.

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