A buffer solution is prepared by mixing 10 ml of 1.0 M acetic acid and 20 ml of 0.5 M sodium acetate and then diluted to 100 ml with distilled water. If the pK a of CH 3 COOH is 4.76, what is the

Question

A buffer solution is prepared by mixing 10 ml of 1.0 M acetic acid and 20 ml of 0.5 M sodium acetate and then diluted to 100 ml with distilled water. If the $pK_{a}$ of $CH_{3} COOH$ is 4.76, what is the pH of the buffer solution prepared?

Options:

Answer:

B

Solution:

pH = pKₐ + $lo g (\frac{[ S a lt ]}{[ A c i d ]})$ = 4.76 + $lo g (\frac{20 \times 0.5}{10}) = 4.76$

TestHub · Accepted Answer

pH = pKₐ + lo g ( [ A c i d ] [ S a lt ] ​ ) = 4.76 + lo g ( 10 20 × 0.5 ​ ) = 4.76

Chemistry - Ionic Equilibrium Question with Solution | TestHub

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