Equation (23.18), which represents the chromatedichromate equilibrium, is actually the sum of two equilibrium expressions. The first

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Equation (23.18), which represents the chromate–dichromate equilibrium, is actually the sum of two equilibrium expressions. The first is an acid–base reaction, H+ + CrO42– ⇌ HCrO4. The second reaction involves elimination of a water molecule between two HCrO4 ions (a dehydration reaction), 2 HCrO4 ⇌ Cr2O72 + H2O. If the ionization constant, Ka for HCrO4 is 3.2 x 107, what is the value of K for the dehydration reaction?

Eq. 23.18

2 CrO2 (aq) + 2 H+ (aq) + 2 H (aq) CrO7 (aq) + HO(1) (23.18)

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General Chemistry Principles And Modern Applications

ISBN: 9780132931281

11th Edition

Authors: Ralph Petrucci, Jeffry Madura, F. Herring, Carey Bissonnette

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