Question

which statement best describes the equation caco3 2hcl → cacl2 co2 h2o? caco3 is a reactant; it is present before the reaction occurs. cacl2 is a reactant; it is present before the reaction occurs. co2 is a reactant because it is most likely a gas. h2o is a reactant because it is most likely a liquid.

Answer 1

Answer:
`CaCO_3` is a reactant; it is present before the reaction occurs.

Explanation:

In a chemical reaction the chemical formulas written before the arrow are described as reactants as they react together to form products which are written after the arrow.

`CaCO_3 + 2HCl \rightarrow CaCl_2 + CO_2 + H_2O`

Thus
`CaCO_3` and HCl are reactants here whereas
`CO_2`,
`CaCl_2` and
`H_2O` are products.

Answer 2

The correct answer among the choices given is the first option. The statement that best describes the reaction given is that calcium chloride or CaCO3 is a reactant. Additionally, hydrochloric acid is a reactant while the compounds on the right side of the reaction are the products.