119. Solving a chemistry problem

119. Solving a chemistry problem

To a buffer solution composed of 200 ml of ammonia solution with C = 0.01 mol/l and 100 ml of ammonium chloride solution with C = 0.02 mol/l was added 20 ml of sodium hydroxide solution with C = 0.05 mol/l . How much will the pH of the buffer solution change? What is the alkali buffer capacity of the solution?

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