20 m l of 0.1 M N a O H is added to 30 ml 0.1 M NaOH 30 ml 0.2 M CH 3 COOH pK a = 4.74 , calculate the pH of the resulting solution? [given: log ⁡ 2 = 0.3 ]

Question

20 m l of 0.1 M N a O H is added to 30 ml 0.1 M NaOH 30 ml 0.2 M CH 3 COOH pK a = 4.74 , calculate the pH of the resulting solution? [given: log ⁡ 2 = 0.3 ], 3.44, 4.01, 4.44, 4.71

MARKS App · Accepted Answer

N a O H + C H 3 C O O H → C H 3 C O O N a + H 2 O m m o l 2 6 L R - 4 2 The resulting solution is an acidic buffer. so pH = pK a + log Salt Acid = 4.71 + log ⁡ 2 4 = 4.44

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