Question

Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equation. Be sure the equation you submit is balanced. (You can edit both sides of the equation to balance it, if you need to.)

Note: you are writing the molecular, and not the net ionic equation.

CaCl2(aq) + H20(1)

Answer 1

Explanation:

A balanced chemical equation is defined as the one that contains equal number of atoms on bot reactant and product side.

For example, $CaCl_{2}(aq) + H_{2}O(l) \rightarrow Ca(OH)_{2}(aq) + HCl(aq)$

Number of atoms on reactant side are as follows.

Ca = 1

Cl = 2

H = 2

O = 1

Number of atoms on product side are as follows.

Ca = 1

Cl = 1

H = 3

O = 2

So, in order to balance the above chemical reaction equation we multiply $H_{2}O$ by 2 on reactant side. Hence, the balanced chemical equation is as follows.

         $CaCl_{2}(aq) + 2H_{2}O(l) \rightarrow Ca(OH)_{2}(aq) + HCl(aq)$

Answer 2

Answer: The reactants of the equation are $HCl\text{ and }Ca(OH)_2$

Explanation:

Neutralization reaction is defined as the reaction in which an acid reacts with a base to produce a salt and water.

$HX+BOH\rightarrow BX+H_2O$

Calcium chloride is a neutral salt formed by the combination of strong acid which is HCl and strong base which is $Ca(OH)_2$

The chemical equation for the reaction of calcium hydroxide and HCl follows:

$Ca(OH)_2(aq.)+2HCl(aq.)\rightarrow CaCl_2(aq.)+2H_2O(l)$

By Stoichiometry of the reaction:

1 mole of aqueous solution of calcium hydroxide reacts with 2 moles of aqueous solution of Hydrochloric acid to produce 1 mole of aqueous solution of calcium chloride and 2 moles of water.

Hence, the reactants of the equation are $HCl\text{ and }Ca(OH)_2$