Home
Class 12
CHEMISTRY
A solution of an organic compound is pre...

A solution of an organic compound is prepared by dissolving `30 g` in `100 g` water. Calculate the molecular mass of compound and the osmotic pressure of solution at `300 K`, when the elevation in boiling point is `0.52` and `K_(b)` for water is `0.52 K m^(-1)`.

Text Solution

Verified by Experts

The given values are
`W_(B)=30 g`,`W_(A)=100 g`,`T=300 K `
`DeltaT_(b)=0.52 K m^(-1)`
Now, using formula
`Mw_(B)=(K_(f)xx1000xxW_(B))/(W_(A)xxDeltaT_(b))`
`=(0.52xx1000xx30)/(100xx0.52)=300 g`
For osmotic pressure,
`pi=(piRT)/V= W_(B)/Mw_(B)xx(RxxT)/V=30/300xx(0.082xx300)/(100//1000)`
=2.45 atm
Promotional Banner

Similar Questions

Explore conceptually related problems

A solution of sucrose (molar mass =342) is prepared by dissolving 68.4 g in 1000 g of water. Calculate The osmotic pressure at 273 K.

A solution of sucrose (molar mass =342) is prepared by dissolving 68.4 g in 1000 g of water. Calculate The boiling point of solution.

A solution of sucrose (molar mass =342) is prepared by dissolving 68.4 g in 1000 g of water. Calculate The freezing point of solution.

A solution was prepared by dissolving 6.0 g an organic compound in 100 g of water. Calculate the osmotic pressure of this solution at 298 K ,when the boiling point of the Solution is 100.2^(@)C . ( K_(b) for water = 0.52 K m^(-1) ), R=0.082 L atm K^(_1) mol^(-1) )

A solution of sucrose (molar mass =342) is prepared by dissolving 68.4 g in 1000 g of water. Calculate The vapour pressure of solution at 293 K is 0.023atm.

Calculate the molar mass of a substance 1 g of which when dissolved in 100 g of water gave a solution boiling at 100.1^(@)C at a pressure of 1 atm (K_(b) for water = 0.52 K kg mol^(-1))

0.2 m aqueous solution of a weak acid (HX) is 20% dissociated. The boiling point of this solution is ( K_(b) for water = 0.52 Km^(-1) )

The boiling point of a solution made by dissolving 12.0 g of glucose in 100 g of water is 100.34^(@)C . Calculate the molecular weight of glucose, K_(b) for water = 0.52^(@)C//m .

What is the boiling point of an aqueous solution containing 0.6g of urea in 100g of water? Kb for water is 0.52 K kg mol^(-1) .