Cold Pack Hypothesis

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The topic for the experiment is how a cold pack can be improved. The problem statement is “Which chemicals would work best at lowering the temperature of water to improve a cold pack?”. The Independent variables are the are three chemicals, ammonium chloride, sodium chloride, and calcium chloride, that will be added to the water. The dependent variable is the temperature of the water in degrees Fahrenheit after the chemicals are added. The constants are the 50 mL of water in each cup, the temperature of the room in degrees Fahrenheit, and the amount of chemicals added in each cup in tablespoons. The control group is the cup with only water in it.
The Scientists think that ammonium chloride will work best at lowering the temperature of the

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