Question

which chemical equation correctly translates the description above?

• aqueous calcium hydroxide reacts with carbon dioxide gas to produce solid calcium carbonate and liquid water.

a caco₃(s) + h₂o(l) → ca(oh)₂(aq) + co₂(g)
b ca(oh)₂(aq) + co₂(g) → caco₃(s) + h₂o(l)
c ca(oh)₂(s) + co₂(aq) → caco₃(s) + h₂o(aq)
d ca(oh)₂(aq) + co₂(g) → caco₃(aq) + h₂o

Explanation:

Step1: Analyze the reactants and products

The reactants are aqueous calcium hydroxide \(Ca(OH)_2(aq)\) and carbon dioxide gas \(CO_2(g)\). The products are solid calcium carbonate \(CaCO_3(s)\) and liquid water \(H_2O(l)\).

Step2: Check each option

• Option a: \(CaCO_3(s)+H_2O(l)\to Ca(OH)_2(aq)+CO_2(g)\) has the reactants and products reversed.
• Option b: \(Ca(OH)_2(aq)+CO_2(g)\to CaCO_3(s)+H_2O(l)\) has the correct reactants and products and the states are also correct.
• Option c: \(Ca(OH)_2(s)+CO_2(aq)\to CaCO_3(s)+H_2O\) has incorrect states for reactants (\(Ca(OH)_2\) should be aqueous and \(CO_2\) should be gas).
• Option d: \(Ca(OH)_2(aq)+CO_2(g)\to CaCO_3(aq)+H_2O\) has incorrect state for \(CaCO_3\) (it should be solid).

Answer:

B. \(Ca(OH)_2(aq)+CO_2(g)\to CaCO_3(s)+H_2O(l)\)