Dissociation constants of CH3COOH and NH4OH in aqueous solution are are almost same (.10- 5.) . If pH of a CH3COOH solution is 3, what will be the pH of NH4OH ?

Question

Dissociation constants of CH3COOH and NH4OH in aqueous solution are are almost same (.10- 5.) . If pH of a CH3COOH solution is 3, what will be the pH of NH4OH ? (A) 3.0 (B) 4.0 (C) 10.0 (D) 11.0

Tardigrade Admin · Accepted Answer

pH of CH3COOH Sol =3 So [.H3O+].=√c × Ka=10- 3 or 10- 3=√c × 1 0- 5 or c=10- 1 M Kb=Ka=10- 5 pH of 10- 3 M Solution of NH4OH [.OH-].=√c × Kb =√1 0- 1 × 1 0- 5=10- 3 pOH =3 or pH=14-3=11

Q. Dissociation constants of CH3​COOH and NH4​OH in aqueous solution are are almost same (10−5) . If pH of a CH3​COOH solution is 3, what will be the pH of NH4​OH ?

3.0

4.0

10.0

11.0

pH of CH3​COOH Sol =3 So [H3​O+]=c×Ka​​=10−3 or 10−3=c×10−5​ or c=10−1 M Kb​=Ka​=10−5 pH of 10−3 M Solution of NH4​OH [OH−]=c×Kb​​ =10−1×10−5​=10−3 pOH =3 or pH=14−3=11

Q. Dissociation constants of $C H_{3} COO H$ and $N H_{4} O H$ in aqueous solution are are almost same $(1 0^{- 5})$ . If pH of a $C H_{3} COO H$ solution is 3, what will be the pH of $N H_{4} O H$ ?