Sodium Chloride Experiment

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The problem being tested is how do different chemicals, such as ammonium chloride, calcium chloride, and sodium chloride, affect the temperature of the water? The hypothesis being studied is, if three grams of calcium chloride is mixed with 50.0mL of water, then the temperature will decrease because there are more atoms in calcium chloride than in ammonium chloride and sodium chloride. The independent variables is the type of chemical and the dependent variable is the change in the temperature of the water. In this experiment, problem being tested was as follows; how do different chemicals, such as ammonium chloride, calcium chloride, and sodium chloride, affect the temperature of the water? It was predicted that if three grams of calcium …show more content…
Ammonium chlorides average change in temperature was -3.9°C, which is a significantly lower drop compared to calcium chloride and sodium chloride. Calcium chloride caused the temperature of the water to increase, with an average growth of 2.8°C. Adding sodium chloride to the deionized water caused the temperature to decrease as well, but the change wasn’t as significant as ammonium chloride. It caused the temperature to decline an average of 1.9°C, which is 2 degrees higher than ammonium chlorides average. This proves the hypothesis wrong, as it was presumed that calcium chloride would cause the temperature to decrease the most, when the data shows that ammonium chloride caused the most considerable change. In addition to the hypothesis being inaccurate, it can be assumed that there are errors within the data itself. There are many outliers present in the data, and none of the results seem to be very precise, with the exception of the ionized water data. For example, the temperature change for sodium chloride ranges from -4.0°C to 0.4°C, a difference of 3.6°C. Dissimilarities within the data are also apparent in a large portion of the experiment, which causes one to question the validity of this test. There is an outlier

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