If the degree of association is 70 % for the reaction 2 A leftharpoons(A)2 the van't-Hoff factor for the solute A is

Question

If the degree of association is 70 % for the reaction 2 A leftharpoons(A)2 the van't-Hoff factor for the solute A is (A) 0.30 (B) 0.70 (C) 0.35 (D) 0.65

Tardigrade Admin · Accepted Answer

2 A leftharpoons(A)2 van't-Hoff factor (i) 70 %=0.7 per unit, i.e. α=0.70 (Given), where, α= degree of association n= number of units undergo for association i=(1-α)+(α/n) ⇒ (1-0.70)+(0.70/2) i=0.30+0.35 ⇒ 0.65

Q. If the degree of association is $70%$ for the reaction $2 A ⇌ (A)_{2}$ the van't-Hoff factor for the solute $A$ is

0.30

0.70

0.35

0.65

$2 A ⇌ (A)_{2}$ van't-Hoff factor $(i)$

$70% = 0.7$ per unit, i.e.

$α = 0.70$ (Given),

where, $α =$ degree of association

$n =$ number of units undergo for association

$i = (1 - α) + \frac{α}{n}$

$\Rightarrow (1 - 0.70) + \frac{0.70}{2}$

$i = 0.30 + 0.35 \Rightarrow 0.65$

Q. If the degree of association is 70% for the reaction 2A⇌(A)2​ the van't-Hoff factor for the solute A is