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What will be the degree of dissociation of 0.1 M Mg(NO3)2 solution if van’t Hoff factor is 2.74?

What will be the degree of dissociation of 0.1 M Mg(NO3)2 solution if van’t Hoff factor is 2.74?

Solutions

Expert Solution

Explanation : 

When Mg(NO3)2 it dissociate into Mg 2+ ion and NO3 - ion. Based on the degree of dissociation formula we are able to calculate directly degree of dissociation. 

 

given vant Hoff factor (i) = 2.74

 

Reaction:

               Mg(NO3)2 ⟶  Mg2+   +    2NO3−

 

Degree of Dissociation

               α = (i−1)/(n−1)                                                                  =(2.74−1)/(3−1)​                                                            =1.742​​​​​​​                                                                              = 0.87

% Degree of Dissociation  = 0.87(100) = 87%


Degree of disssociation is 87%.

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