Starting with 0

question 99

Multiple Choice

Starting with 0.250L of a buffer solution containing 0.250 M benzoic acid (C₆H₅COOH) and 0.20 M sodium benzoate (C₆H₅COONa) , what will the pH of the solution be after the addition of 25.0 mL of 0.100M HCl (K_a (C₆H₅COOH) = 6.5 x 10^-5)

• A) 4.19
• B) 4.10
• C) 4.28
• D) 4.05
• E) 3.78

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