Question

The degree of dissociation ( $\alpha $ ) of a weak electrolyte, K₂SO₄ is related to Vant Hoff factor (i) by the expression

• A. $i=1+2$ $\alpha $
• B. $i=1+3\alpha $
• C. $i=1+\alpha $
• D. $i=1+4\alpha $

Answer 1

Answer: (A)

$\text{K}_{2}SO_{4} \rightarrow 2K^{+}+SO_{4}^{2 -}$
$1-\alpha 2\alpha \alpha $
$i=1+2\alpha $
Therefore, the degree of dissociation (α) of a weak electrolyte, K₂SO₄ is related to van't Hoff factor (i) by the expression $i=1+2\alpha $ .