1.

What is the van't Hoff factor of a completely ionised aqueous solution of (i) NaCl (ii) KCl (iii) MgSO_(4) (iv) K_(2)SO_(4).

Answer»

Solution :(i) `NaCl to Na^(+)+CL^(-)`
`i=(2)/(1)=2`
(ii) `MgSO_(4) to Mg^(2+)+SO_(4)^(2-)`
`i=(2)/(1)=2`
(III) `KCl to K^(+)+Cl^(-)`.
`i=(2)/(1)=2`
(iii) `KCl to K^(+)+Cl^(-)`
`i=(2)/(1)=2`
(IV) `K_(2)SO_(4)to2K^(+)+SO_(4)^(2-)`
`i=(3)/(1)=3`.


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