What is the hydronium-ion concentration of a buffer

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What is the hydronium-ion concentration of a buffer solution that is .25 M Na2HPO4 and .40 M NaH2PO4? For H3PO4, (Ka1=6.9x10-3), (Ka2=6.2x10-8) and (Ka3=4.8x10-13).

Reference no: EM13641179

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