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Arsenic acid, H3AsO4 is a triprotic acid. The acid ionization constants are: Ka1 = 5.5×10-3 ....

Arsenic acid, H3AsO4 is a triprotic acid. The acid ionization constants are: Ka1 = 5.5×10-3 . Ka2 = 1.7×10-7 , Ka2 = 5.1×10-12

a) Write the stepwise ionization equilibria for arsenic acid.

b) Determine for a 0.350 M solution of arsenic acid the pH, and the equilibrium concentrations of all species (H3AsO4, H2AsO4 -, HAsO4 2-, AsO4 3-, H3O+, OH-)

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