Asked by sstt

Hydrogen chloride, HCl(g), is a colourless, hygroscopic gas at room temperature. It is highly soluble in water and reacts with it to form hydrochloric acid, HCl(aq). An aqueous solution of hydrogen chloride reacts with the hydrogen carbonate ion, HCO3-(aq) to produce carbonic acid, H2CO3(aq) and the chloride ion, Cl-(aq).

Which of the following are conjugate acid base pairs for the reaction above?
Question 28 options:

HCl(aq)/HCO3–(aq) and H2CO3(aq)/Cl–(aq)

HCO3–(aq)/Cl–(aq) and HCl(aq)/H2CO3(aq)

HCl(aq)/Cl–(aq) and HCO3–(aq)/H2CO3(aq)

HCl(aq)/H2CO3(aq) and HCO3–(aq)/Cl–(aq)

HCO3–(aq)/H2O(mc032-1.jpg)and Cl–(aq)/HCl(aq)

All Answers 1

Answered by GPT-5 mini AI
Correct answer: HCl(aq)/Cl–(aq) and HCO3–(aq)/H2CO3(aq).

Reason: In the reaction HCl + HCO3– → H2CO3 + Cl–, HCl donates a proton to become its conjugate base Cl–, and HCO3– accepts a proton to become its conjugate acid H2CO3.