5.What is the value of x in given equation?(2) 4(3) 6(4) 8

1.	5.What is the value of x in given equation?(2) 4(3) 6(4) 8
Answer» As H2 is there on RHShence2H+ requiredhence value of X will be 2 Unbalanced equation is:Al + H⁺ ––––––> Al³⁺ + H₂ This can be divided into two parts:Al ––––––> Al³⁺ + 3e⁻ ––– (1)2H⁺ + 2e⁻ ––––––> H₂ ––– (2) Since no. of electrons for a reaction are fixed, so multiply eqn. (1) × 2 and eqn. (2) ×3. Add both the resultant eqns.: 2Al + 6H⁺ ––––––> 2Al³⁺ + 3H₂ This is the balanced equation. And, it can be seen that the value of x is 6. ∴ The correct answer is (3) 6.

Answer»

As H2 is there on RHShence2H+ requiredhence value of X will be 2

Unbalanced equation is:Al + H⁺ ––––––> Al³⁺ + H₂

This can be divided into two parts:Al ––––––> Al³⁺ + 3e⁻ ––– (1)2H⁺ + 2e⁻ ––––––> H₂ ––– (2)

Since no. of electrons for a reaction are fixed, so multiply eqn. (1) × 2 and eqn. (2) ×3. Add both the resultant eqns.:

2Al + 6H⁺ ––––––> 2Al³⁺ + 3H₂

This is the balanced equation. And, it can be seen that the value of x is 6. ∴ The correct answer is (3) 6.

Discussion