The pK_a of acetic acid and pK_b of ammonium hydroxide are 4.76 and 4.75 respectively . Calculate the pH of ammonium acetate solution.

The pK_a of acetic acid and pK_b of ammonium hydroxide are 4.76 and 4.

1.	The pK_a of acetic acid and pK_b of ammonium hydroxide are 4.76 and 4.75 respectively . Calculate the pH of ammonium acetate solution.
Answer» Solution :`pK_a` of `(CH_3COOH)`= 4.76 `pK_b` of `(NH_4OH)`= 4.75 Ammonium ACETATE is a SALT of this both. The PH of ammonium acetate solution is calculate by FOLLOWING EQUATION. `pH=7+1/2(pK_a + pK_b)` `=7+1/2(4.76-4.75)` `=7+1/2(0.01)=7+0.005 = 7.005`