Suppose in the following reaction we begin with 0.250M of HCN. What is the pH at equilibrium. Note that H3O+ = H+. The Kafor HCN is Ka=4.9×10−10. Use an ICE tables to determine your answer.HCN(aq) + H2O(l) ↔H3O+(aq) + CN−(aq)   Draw the titration curve of a triprotic acid when titrated with a base.

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