Question

give the balanced equation for the following. (a) Calcium with water. (b) Hydrogen with chlorine. (c) Hydrogen with copper oxide.​

Answer 1

Explanation:

a) Calcium with water

   Ca + 2H₂O → Ca(OH)₂ + H₂

• This is an example of a redox reaction.

b) Hydrogen with copper oxide

    H₂ + CuO → Cu + H₂O

• Also an example of a redox reaction.

Answer 2

Answer:

a) Calcium with water

Ca + 2 $H_{2} O$  →  $Ca(OH)_{2} +H_{2}$

b)Hydrogen with chlorine

$H_{2}$ + $Cl_{2}$  →  2HCl

C)Hydrogen with copper oxide

CuO  + $H_{2}$  →  Cu + $H_{2} O$

Explanation:

Here the number of atoms on the reactant side is equal to the product side. That is the number of atoms in the reactants and products sides of a chemical equation is equal, it is called a balanced chemical equation.

When a chemical reaction occurs, the mass of the products should equal the mass of the reactants, according to the law of conservation of mass. As a result, the number of atoms in each element does not change as a result of the chemical reaction. As a result, the chemical equation representing the reaction must be balanced.