PROCEDURE PART 2: EFFECT OF NUMBER OF PARTICLES ON FREEZING POINT DEPRESSION (Cal2 in water)
1. Change the chemical to calcium chloride, and reset the number of moles to 1. (see example to the right) Press the "play" button and watch the simulation until the temperature reading (upper right corner) remains constant or until the simulation stops. Record this temperature in the data table below.
2. Repeat step 1 two more times, changing the amount of solute to 2
DATA TABLE PART 2: CaCl, in Water
Moles of CaCl used
1.0
2.0
3.0
Freezing point of solution, °C
1. What happens to the calcium chloride crystal as it comes in contact with the water molecules in the ice? in what way was this process different for calcium chloride than it was for sodium chloride?