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Calculate the pH of a 5.0 M H3PO4 solution and the equilibrium concentrations of the species H3PO4, H2PO4-, HPO42-...

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Chemistry

Calculate the pH of a 5.0 M H3PO4 solutionand the equilibrium concentrations of the speciesH3PO4,H2PO4-,HPO42- and PO43- (ka1 =7.5 x 10-3, ka2 = 6.2 x 10-8, ka3 = 4.8 x10-13)

Answer & Explanation Solved by verified expert
4.2 Ratings (760 Votes)
Sol Major contribution of H is from the first ionization of acid and contributions from second and third ionizations of acid are negligible So pH is calculated only from the first ionization of acid Ist ionization reaction H3PO4 H H2PO4    See Answer
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