The limiting molar conductivities of \(NaI\), \(NaNO_3\) and \(AgNO_3\) are \(12.7\), \(12.0\) and \(13.3\) mS m2 mol–1, respectively (all at 25°C). The limiting molar conductivity of \(AgI\) at this temperature is ____ mS m2 mol–1.
Correct Answer: 14
Solution and Explanation
The limiting molar conductivity of \(AgI\),
\(Λ^0_m(AgI) = Λ^0_m(NaI)+Λ^0_m(AgNO_3)-Λ^0m(NaNO_3)\)
\(Λ^0_m(AgI) = 12.7 + 13.3 – 12.0\)
\(Λ^0_m(AgI) = 26 – 12\)
\(Λ^0_m(AgI) =14\ mS m^2 mol^{–1}\)
So, the answer is \(14\ mS m^2 mol^{–1}\).
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