At 2 5 ∘ C , the dissociation constants of CH 3 COOH and NH 4 OH in aqueous solution are almost the same i.e., 1 0 − 5 . If pH of some acetic acid solution is 3 , the pH of NH 4 OH solution of s

Question

At 2 5 ∘ C , the dissociation constants of CH 3 ​ COOH and NH 4 ​ OH in aqueous solution are almost the same i.e., 1 0 − 5 . If pH of some acetic acid solution is 3 , the pH of NH 4 ​ OH solution of same concentration at the same temperature would be

TestHub · Accepted Answer

p H C H 3 ​ COO H ​ = 3 [ H 3 ​ O + ] = c × K a ​ ​ = 1 0 − 3 c × 1 0 − 5 ​ = 1 0 − 3 c = 1 0 − 1 M pH of 10⁻¹ M solution of NH₄OH [ O H − ] = 1 0 − 1 × 1 0 − 5 ​ = 1 0 − 3 pO H = 3 ∴ p H = 11

Chemistry - Ionic Equilibrium Question with Solution | TestHub

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