Question

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Note: you are writing the molecular, and not the net ionic equation.

→ CaCl2(aq) + H20(l)

Answer 1

Ca(OH)₂ and HCl(aq)

Step-by-step explanation:

We have the products of a reaction, CaCl₂ and H₂O. Since the products are a salt and water, this is likely to be a neutralization reaction. In such a reaction, an acid and a base react to form a salt and water.

• The acid provides the anion of the salt. Since the anion is Cl⁻, the acid is HCl(aq).

• The base provides the cation of the salt. Since the cation is Ca²⁺, the base is Ca(OH)₂(aq).

The complete molecular equation is:

Ca(OH)₂ + 2 HCl(aq) → CaCl₂ + 2 H₂O