Home
Class 12
CHEMISTRY
The freezing point of a diluted milk sam...

The freezing point of a diluted milk sample is found to be`-0.2^(@)C`, while it should have been `-0.5^(@)C` for pure milk. How much water has been added to pure milk to make the diluted sample?

A

1 cup of water to 3 cups of pure milk

B

1 cup of water to 2 cups of pure milk

C

2 cups of water to 3 cups of pure milk

D

3 cups of water to 2 cups of pure milk

Text Solution

Verified by Experts

The correct Answer is:
D
Freezing point of milk `= -0.5^@C :. DeltaT_f = 0.5^@C`
Freezing point of diluted milk `= -0.2^@C :. DeltaT, = 0.2^@C`
`((DeltaT_f)_i)/((DeltaT_f)_(ii))=(0.5)/(0.2)=(k_fm)/(k_fm)`
Both has same amount of solute. Let that is x mole
`(0.5)/(0.2) =("x mole" xx W_2)/(W_1 xx "x mole")`
`5/2=W_2/W_1`
`W_2=5/2W_1`
Promotional Banner

Similar Questions

Explore conceptually related problems

The ratio of milk and water in 55 litres of adulterated milk is 7 : 4 . How much water must be added to make the mixture's ratio 7 : 6 ?

Saritha added 0.5 liter of water to 2 litres of pure milk. Find the percentage of pure milk in the solution.

In a mixture of 45 litres, the ratio of milk and water is 4 : 1 . How much water must be added to make the mixture ratio 3 : 2 ?

On adding an acid in a sample of pure water at 25^(@)C :

450 litres of a mixture of milk and water contain the milk and water in the ratio 9 : 1. How much water should be added to get a new mixture containing milk and water in the ratio 3 : 1?

450 litres of a mixture of milk and water contain the milk and water in the ratio 9:1. How much water should be added to get a new mixture containing milk and water in the ratio 3:1?

In a mixture of 50 litres, milk and water are in the ratio of 3:2. How much water should be added to make the ratio of the two equal?