Question
Balance the following equation stepwise.
Write down the steps in balancing the equation.
$N_{2(g)} + H_{2(g)}\rightarrow NH_{3(g)}.$
Write down the steps in balancing the equation.
$N_{2(g)} + H_{2(g)}\rightarrow NH_{3(g)}.$
✓
Answer
Step $1:$ Write the equation given.
$N_2 + H_2\rightarrow NH_3$_______________$(1)$
Now count the number of atoms of each elements on reactants and product side.
Step $2:$ Number of atoms of elements on both side is not same. So we need to balance it. First we will balance Nitrogen by writing coefficient $2$ for the product $NH_3.$
$N_2+ H_2 \rightarrow 2NH_3$____________$(2)$
Step $3$: Again count the number of atoms of elements on both sides.
Step $4:$ Number of atoms of Nitrogen is now balanced on both sides, but no. of atoms of hydrogen is not balanced. Therefore we write coefficient $3$ for Hydrogen on reactant side. The equation becomes:
$N_2 +3H_2 \rightarrow 2NH_3$
Now the equation is balanced.
$N_2 + H_2\rightarrow NH_3$_______________$(1)$
Now count the number of atoms of each elements on reactants and product side.
| Elements | No. of atoms in reactants | No. of atoms in products |
| $N$ | $2$ | $1$ |
| $H$ | $2$ | $3$ |
$N_2+ H_2 \rightarrow 2NH_3$____________$(2)$
Step $3$: Again count the number of atoms of elements on both sides.
| Elements | No. of atoms in reactants | No. of atoms in products |
| $N$ | $2$ | $2$ |
| $H$ | $2$ | $6$ |
$N_2 +3H_2 \rightarrow 2NH_3$
| Elements | No. of atoms in reactants | No. of atoms in products |
| $N$ | $2$ | $2$ |
| $H$ | $6$ | $6$ |
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