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In the titration of 50 mL of a mixture containing 0.1040 M HCl and 0.1220 M CH3COOH with 0.1800 M NaOH, 15 mL of NaOH

In the titration of 50 mL of a mixture containing 0.1040 M HCl and 0.1220 M CH3COOH with 0.1800 M NaOH, 15 mL of NaOH
What will be the pH of the solution when it is added? (Ka= 1.8.10-5) for CH3COOH

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