20 mL of 0.2 M sodium hydroxide is added to 50 mL of 0.2 M acetic acid solution to give 70 mL of the solution.

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Q 2626023871.     20 mL of 0.2 M sodium hydroxide is added to 50 mL of 0.2 M acetic acid solution to give 70 mL of the solution.
What is the pH of this solution?

Calculate the additional volume of 0.2 M NaOH required to make the pH of the solution 4.74. (Ionisation constant of
CH_3COOH = 1.8 xx 10^(-5).
JEE 1982

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