Phosphoric acid is a triprotic acid in water,ionizing in the following sequential steps: H3PO4 + H2O H2PO4- + H3O+
H2PO4- + H2O HPO42- + H3O+
HPO42- + H2O PO43- + H3O+
What is the Kb expression for the dihydrogen phosphate?
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Correct Answer:
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