which statement best describes the equation caco3 2hcl → cacl2 co2 h2o? caco3 is a reactant; it is present before the reaction o
ccurs. 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.
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.
Answer: 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.
Thus and HCl are reactants here whereas , and are products.
A solid-state<span> phase </span>transformation<span> occurs when the interface between two grains that are chemically or structurally different moves.</span>