A buffer solution contains 500 ml of 0.2 M CH_3COONa and 500 ml of 0.1 M CH_3COOH. 1 L of water is added to this

Question Asked by a Student from EXXAMM.com Team

Q 1119123910.     A buffer solution contains 500 ml of 0.2 M CH_3COONa and 500 ml of 0.1 M CH_3COOH. 1 L of water is added to this buffer.

What will be the pH before and after dilution? (pK_a of CH_3COOH = 4.74)
A

5.04, 5.04

B

5.04, 4.89

C

4.89, 5.04

D

5.04, 3.74

HINT

Use formula: pH = pK_a + log([[CH_3COO^−]]/[[CH_3COOH]])

(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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