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)`.

Explanation

(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`.