To a 100 mL solution of 0.1 M CH 3 COONa and 0.1 M CH 3 COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH 3 COOH) = 4.74 ] A. 0.125 B. 0.225 C. 0.01 D. 0.0872 Ans ; – (D) 0.0872

Question

To a 100 mL solution of 0.1 M CH 3 COONa and 0.1 M CH 3 COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH 3 COOH) = 4.74 ] ​A. 0.125 ​B. 0.225 C. 0.01 ​D. 0.0872 Ans ; – (D) 0.0872

Arun · Answer

Before NaOH addition, pH = pKa = 4.74 [Since [CH3COO– ] = [CH3COOH]] The following reaction occurs due to NaOH addition.

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To a 100 mL solution of 0.1 M CH 3 COONa and 0.1 M CH 3 COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH 3 COOH) = 4.74 ] A. 0.125 B. 0.225 C. 0.01 D. 0.0872 Ans ; – (D) 0.0872

To a 100 mL solution of 0.1 M CH₃COONa and 0.1 M CH₃COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH₃COOH) = 4.74 ]
A. 0.125
B. 0.225
C. 0.01
D. 0.0872
Ans ; – (D) 0.0872

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To a 100 mL solution of 0.1 M CH 3 COONa and 0.1 M CH 3 COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH 3 COOH) = 4.74 ] ​A. 0.125 ​B. 0.225 C. 0.01 ​D. 0.0872 Ans ; – (D) 0.0872

To a 100 mL solution of 0.1 M CH3COONa and 0.1 M CH3COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH3COOH) = 4.74 ] ​A. 0.125​B. 0.225C. 0.01​D. 0.0872Ans ; – (D) 0.0872

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To a 100 mL solution of 0.1 M CH 3 COONa and 0.1 M CH 3 COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH 3 COOH) = 4.74 ] A. 0.125 B. 0.225 C. 0.01 D. 0.0872 Ans ; – (D) 0.0872

To a 100 mL solution of 0.1 M CH₃COONa and 0.1 M CH₃COOH, 0.4 gm of solid NaOH was added . Assuming volume remains constant, the change in pH value will be [Given that pKa (CH₃COOH) = 4.74 ]
A. 0.125
B. 0.225
C. 0.01
D. 0.0872
Ans ; – (D) 0.0872