68. Solving a chemistry problem
4. A. Calculate the pH of a solution containing hydrochloric acid at a concentration of 0.075 mol/l and nitric acid at a concentration of 0.025 mol/l.
B. Calculate the pH of a 10% ammonia solution.
B. Calculate the pH of a 0.1 M potassium carbonate solution and the hydrolysis constant of this salt.
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