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Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 moles of KH2PO4, and enough water to make 0.500 L

Calculate the pH of a buffer solution prepared from 0.155 mol of phosphoric acid, 0.250 moles of KH2PO4, and enough water to make 0.500 L of solution.

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