Target Exam

CUET

Subject

Chemistry

Chapter

Physical: Solutions

Question:

What is the value of van't Hoff factor for complete dissociation of $K_2SO_4$?

Options:

1.00

2.00

3.00

4.00

Correct Answer:

3.00

Explanation:

The correct answer is Option (3) → 3.00

K₂SO₄ dissociates completely in water as:

$\text{K}_2\text{SO}_4 \rightarrow 2\text{K}^+ + \text{SO}_4^{2-}$​

  • Total ions formed = $2(K^+)+1(SO_4^{2-})=3$

So, the van’t Hoff factor $i$ = 3.