Solutions Question 7

Question: If α is the degree of dissociation of Na2SO4 , the Vant Hoff’s factor (i) used for calculating the molecular mass is [AIEEE 2005]

Options:

A) 1+α

B) 1α

C) 1+2α

D) 12α

Show Answer

Answer:

Correct Answer: C

Solution:

Na2SO4 -

2Na+,+,SO42

Mol. before diss. 1 0 0
Mol. after diss 1α 2α 1α

i=Exp.C.P.Normal,C.P.=1α+2α+α=1+2α



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