Question

If a is the degree of dissociation of Na₂SO₄, the Vant Hoff’s
factor (i) used for calculating the molecular mass is
(a) 1 + α (b) 1 – α (c) 1 + 2α (d) 1 – 2α

Answer 1

the anserr to the question is option (A) 1+2α

Na2SO4 ↔ 2Na+ + SO42–

1               0          0

1 – α         2α        α

Vant Hoff factor (i) = (1 – α + 2α + α)/1

= 1 + 2α

hence the option a is the correct answer here.

so i think you have got your answer.

you might thank me for answering if you like.

the question was a very good one.

i encourage you to ask such questions more often

Thank you.