Home
Class 12
CHEMISTRY
Arrange the following solutions in incre...

Arrange the following solutions in increasing order of their osmotic pressures .
(i)34.2 g/litre surcrose
(ii)60 g/litre of urea
(iii)90 g/litre of glucose
(iv)58.5 g/litre of sodium chloride

Text Solution

Verified by Experts

The correct Answer is:
`(a)lt(c)lt(b)lt(d)`
`"Osmotic pressure of a solution Is calculated with the help of Van't Hoff equation": pi=I MRT`
(a) `M=((34.2"g L"^(-1)))/((342"g mol"^(-1)))=0.1"mol L"^(-1)=0.1M`
`pi=i MRT=(1)xx(0.1M)xxRT=(0.1M)xxRT`
(b) `M=((60.0"g L"^(-1)))/((60"g mol"^(-1)))=0.1" mol L"^(-1)=1M`
`pi=i MRT=(1) xx(1 M)xxRT=(1M)xxRT`
(c) `M=((90.0"g L"^(-1)))/((180"g mol"^(-1)))=0.5" g mol"^(-1)=0.5 M`
`pi = i MRT = (1)xx(0.5M)xxRT=(0.5M)xxRT`
(d) `M=((58.5"g L"^(-1)))/((58.5"g mol"^(-1)))=1" mol L"^(-1)=1M`
`pi=iMRT=(2)xx(1M)xxRT=(2M)xxRT.`
`"Correct increasing order of osmotic pressure "= (a)lt (c) lt (b) lt (d).`
Promotional Banner

Similar Questions

Explore conceptually related problems

A solution containing 15 g urea ( molar mass = 60 g mol^(-1) ) per litre of solution in water has the same osmotic pressure (isotonic) as a solution of glucose (molar mass = 180 g mol^(-1) ) in water . Calculate the mass of glucose persent in one litre of its solution.

A solution of glycol containing 1.82 g// litre hasan osmotic pressure of51.8 cmof mercury at 10^(@) .What is the molecular weight of glycol?

(a) Define the following terms: (i) Molarity (ii) Molal elevation constant (k_(b)) (b) A solution containing 15 g (molar mass=60 g mol^(-1)) per litre of solution water has the same osmotic pressure (isotonic ) as a solution of glucose (molar mass =180g mol^(-1)) in water calculate the mass of glucose present in one litre of its solution.

10 litre solution of urea contains 240g urea. The active mass of urea will be

If the osmotic pressure of 5g per litre solution of compound at 27^(@)C is 0.025 atm, calculate the molecular mass of the compound.