Revise Chemistry

There is a univalent metal $M$

Lets say we have a FCC lattice of M(only univalent one is present here). If the side lenght of the cubic lattice being $a=1 A^{o}$ . Density of the cubic lattice is $4 g/cc$ .

If $6 mg$ of metal $M$ is treated with excess $\ce{Cl-}$ we get $\ce{MCl}$ . [ $\ce{MCl}$ is non volatile]

Now this metal chloride prepared is placed inside $100g$ of ethylene glycol solution which causes a elevation in boiling point.

If the $K_{b}=2.26 ^{o}C kg/mol$ of the solvent and the boiling point of the pure solvent is $T_{b}=197^{o}C$ .

Take $T_{1}$ (in K) to be the boiling point of the mixture of the above solution. Take $T=[T_{1}]$ ([.] is box function).

Also if elevation in boiling point is $\delta T_{b}$ . Take $T_{2}=[26\times\delta T_{b}]$ ( $K$ )

In ethylene glycol medium , the dissociation of MCl takes place like

$\ce{MCl <=>} \ce{M+} + \ce{Cl-} \space \space \space (K_{eq}=10)$

(Assume molarity $\approx$ molality) .

Enter value of $T+T_{2}$ . (in Kelvin)

Assume

• Avogadro's Number $N_{A}=6 \times 10^{23}$ .