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The half-equivalence point of a titration occurs half way to the end point, where half of...

The half-equivalence point of a titration occurs half way to the end point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. If 0.540 moles of a monoprotic weak acid (Ka = 7.2 × 10-5) is titrated with NaOH, what is the pH of the solution at the half-equivalence point ​(answer is not 4.65, or 2.214)

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