Calculate the pH of 0.05 M H _2 C _8 H _4 O _4 + H _2 O H _3 O ^+ + HC _8 H _4 O…

CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases

Problem

Calculate the pH of 0.05 M KHC8H4O4\text{KHC}_8\text{H}_4\text{O}_4 H2C8H4O4+H2O⇌H3O++HC8H4O4−;pKa1=2.94\text{H}_2\text{C}_8\text{H}_4\text{O}_4 + \text{H}_2\text{O} \rightleftharpoons \text{H}_3\text{O}^+ + \text{HC}_8\text{H}_4\text{O}_4^-; \quad pK_{a1} = 2.94 HC8H4O4−+H2O⇌H3O++C8H4O42−;pKa2=5.44\text{HC}_8\text{H}_4\text{O}_4^- + \text{H}_2\text{O} \rightleftharpoons \text{H}_3\text{O}^+ + \text{C}_8\text{H}_4\text{O}_4^{2-}; \quad pK_{a2} = 5.44

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