Problem: What is the hydrolysis reaction associated with Ka2 for phosphoric acid, H3PO4?A. H3PO4(aq) + H2O(l) ⇌ H2PO4-(aq) + H3O+(aq)B. H2PO4-(aq) + H2O(l)  ⇌ HPO42-(aq) + H3O+(aq)C. HPO42-(aq) + H2O(l)  ⇌ PO43−(aq) + H3O+(aq)

FREE Expert Solution

Phosphoric acid (H3PO4) is a weak triprotic acid, meaning it can donate three protons (H+and it will have three equilibrium reactions.

Removing one H+ per step in H3PO4:

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Problem Details

What is the hydrolysis reaction associated with Ka2 for phosphoric acid, H3PO4?

A. H3PO4(aq) + H2O(l) ⇌ H2PO4-(aq) + H3O+(aq)

B. H2PO4-(aq) + H2O(l)  ⇌ HPO42-(aq) + H3O+(aq)

C. HPO42-(aq) + H2O(l)  ⇌ PO43−(aq) + H3O+(aq)

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Our tutors have indicated that to solve this problem you will need to apply the Polyprotic Acid concept. You can view video lessons to learn Polyprotic Acid. Or if you need more Polyprotic Acid practice, you can also practice Polyprotic Acid practice problems.