If relative decrease in vapour pressure is $0.4$ for a solution containing $1$ mol $N a C l$ in $3$ mol $H_{2} O$ .
$N a C l$ is_____ % ionized.

60

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

50

No worries! We‘ve got your back. Try BYJU‘S free classes today!

100

No worries! We‘ve got your back. Try BYJU‘S free classes today!

40

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B $60$ %
no. of moles of $N a C l$ =1
relative lowering of vapour pressure = $i×mole fraction of solute$

relative lowering of vapour pressure= $\frac{i \times n (s o l u t e)}{n (s o l u t e) + n (s o l v e n t)}$
0.4= $i \times \frac{1}{4}$
therefore $i = 1.6$
degree of dissociation/ionisation= $\frac{i - 1}{n - 1}$

$N a C l \to N a^{+} + C l^{-}$ So, $n = 2$

$α = 0.6$
= $60 %$
Option A is correct.

Suggest Corrections

Similar questions

Q. If relative decrease in vapour pressure is 0.8 for a solution containing equimolar

N a C l a n d H_{2} O

, then percentage ionization of

N a C l

is:

Q. If relative decrease in V.P is 0.4 for a solution containing 1 mol

N a C l

in 3 mol of H

_{2}

O. Calculate % ionization of

N a C l

Relative decrease in vapor pressure is 0.4 for a solution containing 1 mole AB in 3 mol $H_{2} O$ , therefore AB is ionised at the extent(percentage) of:

Q. Addition of a non-volatile solute to a solvent always increases the colligative property such as

π, \frac{Δ P}{P^{\circ}}, Δ T_{b}

and

Δ T_{f}

. All these colligative properties are directly proportional to the molality. The increase in colligative properties is due to increase in number of solute particles.
If relative decrease in vapour pressure is 0.4 for a solution containing 1 mole NaCl in 3 moles of

H_{2} O

, then what is the percentage ionization of NaCl?

Q. The relative decrease in the vapour pressure of an aqueous solution containing 2 mol

[C u {(N H_{3})}_{3} C l] C l

in 3 mol

H_{2} O

is 0.50.On reaction with

A g N O_{3}

, this solution will form:

Join BYJU'S Learning Program

If relative decrease in vapour pressure is 0.4 for a solution containing 1 mol NaCl in 3 mol H2O. NaCl is_____ % ionized.

If relative decrease in vapour pressure is $0.4$ for a solution containing $1$ mol $N a C l$ in $3$ mol $H_{2} O$ .
$N a C l$ is_____ % ionized.