A certain substance X melts at a temperature of −9.9°C . But if a 350g sample of X is prepared with 31.8g of urea NH22CO dissolved in it, the sample is found to have a melting point of −13.2°C instead.
a. Calculate the molal freezing point depression constant Kf of X . Round your answer to 2 significant digits.
the molal freezing point depression constant Kf of X = 2.18 degree celsius
Explanation:
The step by step calculation using the relationship between the depression of freezing point and the molal concentration is as shown in the attachment.
