The half-equivalence point of a titration occurs half way to the equivalence point, where half of the analyte has reacted to

Question

The half-equivalence point of a titration occurs half way to the equivalence point, where half of the analyte has reacted to form its conjugate, and the other half still remains unreacted. 
If 0.580 moles of a monoprotic weak acid (K₂ = 7.5 x 10-5) is titrated with NaOH, what is the pH of the solution at the half-equivalence point?

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