Acid-Base Hydrolysis of Ions Worksheet 1. What is the [OH-] of a 0.10 M solution of NaCN? 2. Calculate the pH of a 0.10 M NaC2H3O2 solution. Ka for HC2H3O2 = 1.8 x 10-5. 3. Consider a salt, A+B-, which reacts with water in such a way that both A+ and B- hydrolyse to give a weak base, AOH and a weak acid BH respectively. Given that Ka = 1.0 x 10-5 and Kb = 1.0 x 10-10 predict whether the resulting solution would be acidic or basic and explain your answer. 4. Aspirin is acetylsalicylic acid, a monoprotic acid whose Ka value is 3.27 X 10-4. Does a solution of the sodium salt of aspirin in water test acidic, basic, or neutral? Explain. 5. The Kb value of the oxalate ion, C2O42-, is 1.85 X 10-10. Is a solution of K2C2O4 acidic, basic, or neutral? Explain. 6. Consider the following compounds and suppose that 0.5 M solutions are prepared of each: NaI, KF, (NH4)2SO4, KCN, HC2H3O2, CsNO3, and KBr. Write the formulas of those that are (a) acidic, (b) basic, (c) neutral. 7. Calculate the pH of 0.15 M Na2SO3