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As hydrogen ions, H+ are added to an acidic buffer solution made of acetic acid (...

As hydrogen ions, H+ are added to an acidic buffer solution made of acetic acid ( CH3COOH ) and sodium acetate, what happens to [CH3COOH ] and [ CH3COO¯ ] (conjugate base)?

A. Both [CH3COOH ] and [ CH3COO¯ ] increase

B. Both [CH3COOH ] and [ CH3COO¯ ] decrease

C. [CH3COOH ] increases but [ CH3COO¯ ] decreases

D. [CH3COOH ] decreases but [ CH3COO¯ ] increases

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