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)

${\text{K}}_{2}S{O}_4\to 2K^{+}+S{O}_4^{2-}$
$1-\alpha 2\alpha \alpha$
$i=1+2\alpha$
Therefore, the degree of dissociation (α) of a weak electrolyte, K₂SO₄ is related to van't Hoff factor (i) by the expression $i=1+2\alpha$ .