question_answer

If\[\alpha \]is the degree of dissociation of\[N{{a}_{2}}S{{O}_{4}},\] the van't Hoff factor (i) used for calculating the molecular mass is     AIEEE  Solved  Paper-2005

A) \[1-2\alpha \]                   

B)        \[1+2\alpha \]  

C)        \[1-\alpha \]                      

D)        \[1+\alpha \]

Correct Answer: B

Solution :

van't Hoff factor where, y is the number of ions from one mole solute, (in this case=3 ), the degree of dissociation. Alternate Solution

1	0	0

Total degree of dissociation