Question

In the reaction CuO(s) + CO2(g) → CuCO3(s), a. CO2 is the Lewis acid and CuCO3 is its conjugate base. b. O2– acts as a Lewis base and Cu2+ acts as a Lewis acid. c. CuO is the Lewis acid and CuCO3 is its conjugate base. d. O2– acts as a Lewis base and CO2 acts as a Lewis acid. e. Cu2+ acts as a Lewis acid and CO32– acts as a Lewis base.

Answer 1

Answer: The correct answer is Option d.

Explanation:

According to Lewis acid-base concept:

The substance which is donating electron pair is considered as Lewis base and the substance which is accepting electron pair is considered as Lewis acid.

For the given chemical reaction:

$CuO(s)+CO_2(g)\rightarrow CuCO_3(s)$

$CO_2$ is accepting electron pair and is getting converted to $CO_3^{2-}$. Thus, it is considered as Lewis acid.

$O^{2-}$ present in CuO is a Lewis base because it is donating electron pair.

Thus, the correct answer is Option d.