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AP EAMCET202316 May 2023Evening ShiftChemistrySolutionsActual

When 10⁻³ M solution of glucose in water, freezes at -0.0186^ C , then at what temperature 10⁻³ M solution of NaCl will freeze?

Options

  1. A0 ^ C
  2. B0.186^ C
  3. C-0.186^ C
  4. D-0.0372^ C

Correct answer

D. -0.0372^ C

Step-by-step solution

aligned & T _ f =0.0^ C - (-0.0186^ C )=0.086^ C & (glucose) aligned T _ f = i m k _ f Both solutions have the same molar concentrations so their molal concentration will also be the same. aligned & Also, i for NaCl =2 & aligned & T _ f ( NaCl )=2 T _ f (glucose) & =2 0.0186 ^ C =0.0372 ^ C aligned aligned Thus, the NaCl solution will freeze at -0.0372 ^ C

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