Question

Sodium chloride and calcium carbonate combine to form sodium carbonate and calcium chloride in the reversible reaction.

Answer 1

Answer:

I think is Number 2

The rate at which calcium chloride is equal to the rate at which sodium chloride is produced.

Let me know if I'm wrong.

Answer 2

The statement that is necessarily correct about the reaction is that both calcium carbonate and sodium carbonate are being produced

2NaCl + CaCO3 ⇌ Na2CO3 + CaCl2

The reaction above is a reversible reaction. A reversible reaction is a reaction in which the conversion of reactant to products and the conversion from product to reactant occurs simultaneously. This reaction is just like a back and forth reaction.

⇌ symbol represents a reversible reaction. Therefore, the statement that is necessarily correct about the reaction is that both calcium carbonate and sodium carbonate are being produced

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