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wedge^(@).(m) for CaCl(2) and MgSO(4) fr...

`wedge^(@)._(m)` for `CaCl_(2)` and `MgSO_(4)` from the given data.
`lambda_(Ca^(2+))^(@)=119.0S cm^(2)mol^(-1)` ltbr. `lambda_(Cl^(c-))^(@)=76.3S cm^(2)mol^(-1)`
`lambda_(Mg^(2+))^(@)=106.0S cm^(2)mol^(-1)`
`lambda_(SO_(4)^(2-))^(@)=160.0 cm^(2)mol^(-1)`

Text Solution

Verified by Experts

We know from Kohlrausch law that
`^^_(m(CaCl_(2)))^(@)=lamda_(Ca^(2+))^(@)+2lamda_(Cl^(-))^(@)=119.0S" "cm^(2)mol^(-1)+2(76.3)S" "cm^(3)" "mol^(-1)`
`=(119.0+152.6)S" "cm^(2)" "mol^(-1)`
`=271.6S" "cm^(2)" "mol^(-1)`
`^^_(m(MgSO_(4)))=lamda_(Mg^(2+))^(@)+lamda_(SO_(4)^(2-))=106.0S" "cm^(2)" "mol^(-1)+160.0S" "cm^(2)" "mol^(-1)`
`=266S" "cm^(2)" "mol^(-1)`
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