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CBSE Class 12-science Answered

A certain aqueous solution boils at 100.303°C. What is its freezing point
Asked by rajaasthana77 | 08 Jan, 2023, 12:24: PM
Expert Answer
Dear Student
 

Boiling point of pure water = 100 °C

Boiling point of solution of urea = 100.13 °C T = 100.13 - 100 = 0.13°C

Now,

T = m x Kb

0.13 = m x 0.52 m = 0.25  

T = m x Kf

T = 0.25 x 1.86 = 0.47 °C

Therefore, the freezing point of the solution = 0°C - 0.47 = - 0.47 °C

Answered by | 08 Jan, 2023, 06:20: PM

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