PLEASE HELP!!! Calculate the pH of 25 mL of 0.2 M CH3COOH + 25 mL 0.1 NaCH3COO.?

Question

Calculate the pH of 25 mL of 0.2 M CH3COOH + 25 mL 0.1 NaCH3COO.

Please explain.

THANKS!!!

Answer 1

upon mixing the 25 ml & 25ml :

0.2 M CH3COOH is diluted 25 ml / 50 ml = 0.1 Molar

0.1 NaCH3COO is diluted 25 ml / 50 ml = 0.05 Molar

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CH3COOH -->  H+   &   CH3COO-

K = [H+]   [CH3COO-] / [CH3COOH]

1.8e-5 = [H+]   [0.05] / [0.10]

H+ = 3.6e-5 molar

your answer: pH = 4.44