Question

The limiting molar conductivities of $NaI,NaN{O}_3$ and $AgN{O}_3$ are $12.7,12.0$ and $13.3mS{m}^{2}mo{l}^{-1}$, respectively (all at $25^{\circ }C$ ). The limiting molar conductivity of $AgI$ at this temperature is ______$mS{m}^{2}mo{l}^{-1}$

Answer 1

Answer: 14

Given
(1) ${\lambda }_m^{\infty }(NaI)=12.7mS{m}^{2}mo{l}^{-1}$
(2) ${\lambda }_m^{\infty }\left(NaN{O}_3\right)=12.0mS{m}^{2}mo{l}^{-1}$
(3) ${\lambda }_m^{\infty }\left(AgN{O}_3\right)=13.3mS{m}^{2}mo{l}^{-1}$
${\lambda }_m^{\infty }(AgI)=(1)+(3)-(2)$
$=12.7+13.3-12.0$
$=26.0-12.0$
${\lambda }_m^{\infty }(AgI)=14.0$