(a) Write a balanced equation for the reaction that occurs when H3PO4, phosphoric acid, donates a proton to water to form the dihydrogen phosphate ion.

(b) Write a net ionic equation showing the dihydrogen phosphate ion acting as a Brønsted acid in a reaction with water. Write another net ionic equation showing the dihydrogen phosphate ion acting as a Brønsted base in a reaction with water. What term is used to describe a species such as the dihydrogen phosphate ion that can act both as an acid or as a base?

Question

(a) Write a balanced equation for the reaction that occurs when H3PO4, phosphoric acid, donates a proton to water to form the dihydrogen phosphate ion.
 
(b) Write a net ionic equation showing the dihydrogen phosphate ion acting as a Brønsted acid in a reaction with water. Write another net ionic equation showing the dihydrogen phosphate ion acting as a Brønsted base in a reaction with water. What term is used to describe a species such as the dihydrogen phosphate ion that can act both as an acid or as a base?

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