PS-3.5 - Solubility of Ammonium Chloride Lab

8. Turn up the hot plate to warm the solution to 60°C. Then, repeat steps 6 and 7 with the
solution at this temperature.
9. Turn up the hot plate to warm the solution to 80°C. Then, repeat steps 6 and 7 with the
solution at this temperature.
10. When you have recorded all of your data, turn off the hot plate and allow the solution to
cool. Rinse the solutions down the drain. Let the water run continuously for about 1
minute.
11. On a sheet of paper, make a graph of the solubility of ammonium chloride versus
temperature. Plot temperature on the horizontal x-axis and solubility (in spoonfuls per 50
mL water) on the vertical axis.
Observations:
Temperature
(°C)
18-20
Number of Spoonfuls of Ammonium Chloride
Dissolved
40
60
80
Include the following questions in your discussion and don’t forget a conclusion:
1. Create a graph of the above information.
2. Predict what effect, if any, you think the size of salt grains would have on their solubility.
Explain your answer.
3. Based on your graph and your observations what do you think the solubility of ammonium
chloride (in spoonfuls per 50 mL water) would be at 10°C? At 70°C? At 100°C?