H2PO4^- + OH^- ==> HPO4^2- + H2O
The acid is the one with more H and the base the one with fewer H atoms. The above reaction shows how the buffer works with base to keep the pH the same.
Write the chemical equation showing dihydrogen phosphate and hydrogen phosphate conjugate acid-base relationship. Identify the acid and base. Explain how the equilibrium is shifted as buffer reacts with an acid and reacts with a base.
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