[ale1998]

Hello,
I did an experiment on how different concentrations of ZnCl₂ affect the freezing point of demi water. My results were that till a concentration of about 10 mol dm^-3 the freezing point decreased (more or less in a linear manner). After that at concentrations of 15mol dm^-3 the freezing point started to increase again (approach 0 degrees Celsius again).

Attached in the file is a graph of the freezing point depression vs. the concentration of ZnCl₂ in demi water.
X-axis: concentration of ZnCl₂ in mol dm^-3
Y-axis: freezing point depression in Kelvin

Does anybody know why the freezing point depression initially decreases, and then past a certain concentration increases again?

Thanks in advance!

Ale1998

[mjc123]

Google "eutectic mixture"

[Vidya]

Eutectic point or temperature
https://en.wikipedia.org/wiki/Eutectic_system