The pK_a of acetic acid and pK_b of NH_4OH are 4.76 and 4.75, respectively. Calculate the pH of ammonium acetate solution

Question

The pK_a of acetic acid and pK_b of NH_4OH are 4.76 and 4.75, respectively. Calculate the pH of ammonium acetate solution.

MARKS Content Team · Accepted Answer

Correct answer: (B) 7.005. Acetic acid and NH_4OH are weak acid (W_A) and weak base (W_B) respectively. When they combine a salt of W_A and W_B i.e., ammonium acetate is formed. So by using hydrolysis equation for salts of W_A and W_B , pH=1/2(pK_w+pK_a-pK_b) =1/2 14+4.76−4.75 =7+0.005=7.005 .

The $p K_{a}$ of acetic acid and $p K_{b}$ of $N H_{4} O H$ are 4.76 and 4.75, respectively. Calculate the pH of ammonium acetate solution.

Solution

More Ionic Equilibrium Questions

The pKa of acetic acid and pKb of NH4OH are 4.76 and 4.75, respectively. Calculate the pH of ammonium acetate solution.

Solution

More Ionic Equilibrium Questions

The $p K_{a}$ of acetic acid and $p K_{b}$ of $N H_{4} O H$ are 4.76 and 4.75, respectively. Calculate the pH of ammonium acetate solution.