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0.01 M solution of KCl and CaCl ₂ are prepared in water. The freezing point of KCl is found to be -2^ C . What is the freezing point of CaCl ₂ to be completely ionised?

Options

  1. A-3^ C
  2. B+3^ C
  3. C-2^ C
  4. D-4^ C

Correct answer

A. -3^ C

Step-by-step solution

i for KCl =2, i for for CaCl ₂=3 aligned & T_f( KCl ) T_f i = 2 T_f ( CaCl ₂ ) = 2 3 aligned T_f ( CaCl ₂ )= 3 2 2=3^ C Freezing point of CaCl ₂=-3^ C

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