Question

When water that contains a solute freezes, the solute is not typically incorporated into the crystal lattice (i.e. it is excluded from the frozen portion and remains in the rest of the solution). In this experiment, you were instructed to determine the temperature right as freezing began. Would it have mattered if you let a substantial portion of the solution freeze before recording the temperature? Explain.

Answer 1

Answer:

It matters

Explanation:

Pure substance are known to have a sharp freezing point. However, the presence of solute lowers the freezing point of the solvent. The best time to measure the freezing point is when the freezing process is just beginning.

It will be an error to measure the freezing point when the part of the solution has already frozen.