Question

The following equilibrium is established when hydrogen chloride is dissolved in acetic acid

HCl (aq) + CH3COOH (aq) $\rightleftharpoons$Cl– (aq) + CH3 COOH2+(aq).

The set that characterises the conjugate acid-base pairs is

• A. (HCl, CH3COOH) and (CH3COOH2+, Cl–)
• B. (HCl, CH3COOH2+) and (CH3COOH, Cl–)
• C. (CH2COOH2+, HCl) and (Cl–, CH3COOH)
• D. (HCl, Cl–) and (CH3COOH2+, CH3COOH).

Answer 1

Answer: (D)

(HCl, Cl–) and (CH3COOH2+, CH3COOH).

Answer 2

HCl (aq) + CH3COOH (aq) $\rightleftharpoons$ Cl– (aq) + CH3 COOH2+(aq).

Acid-1 base-2 base-1 acid-2