Estimate the value (x) to balance the given equation.

${Mg}_{3} N_{2} (aq) + {xH}_{2} O (l) \to 3 mg {(OH)}_{2} (aq) + 2 {NH}_{3} (g)$

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Solution

A balanced chemical equation has an equal number of atoms on both sides of a chemical reaction.

For the given equation : ${Mg}_{3} N_{2} (aq) + {xH}_{2} O (l) \to 3 Mg {(OH)}_{2} (aq) + 2 {NH}_{3} (g)$

Reactants

Products

Elements

No. of atoms

Elements

No. of atoms

Mg

3

Mg

3

N

2

N

2

H

2

H

12

O

1

O

6

Here, Mg and N atoms are balanced on both sides.To balance H and O atoms, the value of (x) should be 6.

Hence, the balanced equation is:
${Mg}_{3} N_{2} (aq) + 6 H_{2} O (l) \to 3 Mg {(OH)}_{2} (aq) + 2 {NH}_{3} (g)$

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