Calcium oxide and carbon dioxide combine to form calcium carbonate in the reversible reaction:

CaO + CO2 ⇌ CaCO3

When the reaction is at dynamic equilibrium, which statement must be true?

(1 point)
Responses

The forward and reverse reactions have stopped.
The forward and reverse reactions have stopped.

The concentration of calcium carbonate is increasing.
The concentration of calcium carbonate is increasing.

The reaction has run out of carbon dioxide or calcium oxide.
The reaction has run out of carbon dioxide or calcium oxide.

Calcium carbonate and calcium oxide are formed at the same rate.

1 answer

In a dynamic equilibrium, the forward and reverse reactions continue to occur at equal rates, which means that the concentrations of reactants and products remain constant over time.

Therefore, among the options provided, the correct statement is:

Calcium carbonate and calcium oxide are formed at the same rate.

This indicates that the rates of the forward and reverse reactions are equal, resulting in no net change in the concentrations of the reactants and products.