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 reaction has run out of carbon dioxide or calcium oxide. The reaction has run out of carbon dioxide or calcium oxide. 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. Calcium carbonate and calcium oxide are formed at the same rate.
Calcium carbonate and calcium oxide are formed at the same rate.
Is this right
Yes, that is correct. At dynamic equilibrium, the forward and reverse reactions are occurring at the same rate, resulting in the formation of calcium carbonate and calcium oxide at equal rates.
To determine which statement must be true when the reaction is at dynamic equilibrium, we need to understand the concept of dynamic equilibrium.
Dynamic equilibrium occurs in a reversible reaction when the forward and reverse reactions are occurring at the same rate. It means that while reactants are converting into products, products are also converting back into reactants at the same rate. At dynamic equilibrium, the concentrations of both reactants and products remain constant.
Now, looking at the given options:
1. "The reaction has run out of carbon dioxide or calcium oxide." - This statement implies that either calcium oxide or carbon dioxide has completely disappeared, which is not the case at dynamic equilibrium. Both reactants must still be present in equal concentrations.
2. "The forward and reverse reactions have stopped." - This statement suggests that no reactions are occurring, which contradicts the concept of dynamic equilibrium. Both forward and reverse reactions continue, but at the same rate.
3. "The concentration of calcium carbonate is increasing." - This statement implies that the concentration of calcium carbonate is increasing, but at dynamic equilibrium, the concentrations of all substances remain constant. Therefore, this statement is incorrect.
4. "Calcium carbonate and calcium oxide are formed at the same rate." - This statement accurately represents dynamic equilibrium. At this point, the forward and reverse reactions are occurring at the same rate, meaning that the formation of calcium carbonate from calcium oxide and carbon dioxide is balanced by the formation of calcium oxide and carbon dioxide from calcium carbonate.
Hence, the correct statement is: "Calcium carbonate and calcium oxide are formed at the same rate."