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

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Correct answer: B. (b) Freezing point of diluted milk =-0.2°C ∆T_f^ '=0.2°C Freezing point of pure milk =-0.5°C ∆T_f=0.5°C ∆T_f ∆T_f^ '= K_f mK_f m ' ;m= mole of solute mass of solvent ( kg ) ∵ Moles of solute are same in both samples. ∴ 0.50.2= W^ 'W W^ 'W= 52 ;W^ '= 52W 2 cups of pure milk is mixed with 3 cups of water to make 5 cups of diluted milk.

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

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