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Q.

X mole of KCl and Y mole of BaCl2 are both dissolved in 1kg of water. Givenx = y = 0.1 and Kf = 1.85 k molal-1 , what is the observed range of Tf If the ratio of x to y is varied

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a

0.185 to 0.93

b

0.37 to 0.93

c

0.37 to 0.55

d

0.56 to 0.93

answer is B.

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Detailed Solution

Tf1=0.1×1.85=0.185

Tf1=0.1×1.85×5=0.93

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X mole of KCl and Y mole of BaCl2 are both dissolved in 1kg of water. Givenx = y = 0.1 and Kf = 1.85 k molal-1 , what is the observed range of ∆Tf If the ratio of x to y is varied