A solution of urea in water has a boiling point of `100.128^(@)C`. Calculate the freezing point of the same solution. Molal constants for water `K_(f)` and `K_(b)` are `1.86^(@)C and 0.512^(@)C` respectively.

Explanation

To calculate the freezing point of the urea solution, we need to use the boiling point elevation and freezing point depression concepts. Here are the steps to solve the problem:

### Step 1: Determine the boiling point elevation
The boiling point of pure water is 100°C. The boiling point of the urea solution is given as 100.128°C.

\[ \Delta T_b = T_b (solution) - T_b (pure \, water) = 100.128°C - 100°C = 0.128°C \]
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