General Chemistry
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Both H2O and H2PO4- are amphoteric. Write an equation to show how each substance can act as an acid and another equation to show how each can act as a base.
H2PO4-(aq) + H2O(l) ⇋ H3O+(aq) + HPO42-(aq)
H2PO4-(aq) + H3O+(aq) ⇋ H3PO4(aq) + H2O(l)
H2PO4-(aq) + H2O(l) ⇋ H3PO4(aq) + OH-(aq)
H2PO4-(aq) + H2O(l) ⇋ H3O+(aq) + HPO4-(aq)
H2PO4-(aq) + H2O(l) ⇋ H3O+(aq) + PO42-(aq)
H2PO4-(aq) + H2O(l) ⇋ H2PO4+(aq) + OH-(aq) + H2(g)