Question

This equation is not balanced. Click on the coefficient we should change first. help ASAP

Answer 1

Answer:  The coefficient we should change first is for $NO_{3}$.

Explanation:

The given reaction equation is as follows.

$Al + Ni(NO_{3})_{2} \rightarrow Al(NO_{3})_{3} + Ni$

Here, number of atoms present on reactant side are as follows.

• Al = 1
• Ni = 1
• $NO_{3}$ = 2

Number of atoms present on the product side are as follows.

• Al = 1
• Ni = 1
• $NO_{3}$ = 3

To balance this equation, multiply Al by 2 and $NO_{3}$ by 3 on reactant side. Also, multiply $Al(NO_{3})_{3}$ by 2 and Ni by 3 on the product side.

Hence, the equation can be rewritten as follows.

$2Al + 3Ni(NO_{3})_{2} \rightarrow 2Al(NO_{3})_{3} + 3Ni$

Now, number of atoms present on reactant side are as follows.

• Al = 2
• Ni = 3
• $NO_{3}$ = 6

Number of atoms present on product side are as follows.

• Al = 2
• Ni = 3
• $NO_{3}$ = 6

Since, the atoms on both reactant and product side are same. Hence, it is now a balanced chemical equation.

Thus, we can conclude that the coefficient we should change first is for $NO_{3}$.