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NCERT Q7
Write the balanced chemical equations for the following reactions.
(c) Aluminium + Copper chloride → Aluminium chloride + Copper
Answer
(c) Al + CuCl 2 → AlCl 3 + Cu
|
Name of the element |
No. of atoms in reactants |
No. of atoms in products |
|
Aluminium |
1 |
1 |
|
Copper |
1 |
1 |
|
Chlorine |
2 |
3 |
To balance Chlorine,
Multiply CuCl 2 by 3 and AlCl 3 by 2
Al + 3 CuCl 2 → 2 AlCl 3 + Cu
|
Name of the element |
No. of atoms in reactants |
No. of atoms in products |
|
Aluminium |
1 |
2 |
|
Copper |
3 |
1 |
|
Chlorine |
6 |
6 |
To balance Aluminium,
Multiply Al by 2
To balance Copper,
Multiply Cu by 3
2 Al + 3 CuCl 2 → 2 AlCl 3 + 3 Cu
|
Name of the element |
No. of atoms in reactants |
No. of atoms in products |
|
Aluminium |
2 |
2 |
|
Copper |
3 |
3 |
|
Chlorine |
6 |
6 |
Now, all the elements are balanced and the balanced equation is
2 Al + 3 CuCl 2 → 2 AlCl 3 + 3 Cu
