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#### Question

Write the formula to determine the molar mass of a solute using freezing point depresssion method.

#### Solution

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#### Similar questions

Calculate the amount of CaCl_{2} (molar mass = 111 g mol^{−1}) which must be added to 500 g of water to lower its freezing point by 2 K, assuming CaCl_{2} is completely dissociated. (K_{f} for water = 1.86 K kg mol^{−1})

A 5% solution (by mass) of cane sugar in water has freezing point of 271 K. Calculate the freezing point of 5% glucose in water if freezing point of pure water is 273.15 K.

Calculate the depression in the freezing point of water when 10 g of CH_{3}CH_{2}CHClCOOH is added to 250 g of water. *K*_{a} = 1.4 × 10^{−3}, *K*_{f }= 1.86 K kg mol^{−1}.

The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.

Which of the following solutions shows maximum depression in freezing point?

(A) 0.5 M Li_{2}SQ_{4}

(B) 1 M NaCl

(C) 0.5 M A1_{2}(SO_{4})_{3}

(D) 0.5 MBaC1_{2}