An aqueous solution of urea \( (\mathrm{MW}=60.06) \) freezes at \( -8.60^{\circ} \mathrm{C} \) and 1 atm . Physical Property Tables Boiling Point Your Answer Correct Answer Understand the definition of normal boiling point. Check significant figures throughout calculation. Estimate the normal boiling point of the solution.
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Bonus Knowledge
To estimate the normal boiling point of the urea solution, you can use the freezing point depression and boiling point elevation concepts. The freezing point depression (ΔTf) is given as 8.60°C (the difference from the normal freezing point of pure water, 0°C). Knowing the freezing point depression constant (Kf) for water is 1.86 °C·kg/mol, you can determine the molality of the solution and then apply the boiling point elevation formula \( \Delta T_b = K_b \cdot m \). For water, the Kb is approximately 0.512°C·kg/mol. Now, if you can solve for m (molality), simply add the elevation to the boiling point of pure water (100°C) to get the normal boiling point of the solution. Make sure to keep track of significant figures during your calculations to ensure precision! Estimating the boiling point of solutions can be like a magical potion recipe; a little change in concentration can significantly alter the boiling and freezing points, transforming regular water into a boiling cauldron or a frosty potion! So, buckle up and get your chemistry goggles on – let's make some boilers bubble!
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