Qualitative Tests Performed On Unknown Water Sample

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Dear Mr. Prosecutor,
After receiving your unknown water sample codenamed JAVRE, a series of qualitative and quantitative tests were performed on the sample in comparison to local water supplies. The sample was tested in comparison to Jordan River, White River, Lake Monroe, Lake Lemon, and Clear Creek. The tests performed on the samples included qualitative tests that would indicated the presence of certain chemicals. These tests included a test for Carbohydrates, Calcium, Phosphate, Proteins, and Salicylic Acid. The test for each of these would result in a clear indication of whether or not the chemical is present in the sample. Once the qualitative tests were performed and certain samples could be eliminated the remaining samples could be narrowed down through a series of quantitative tests. These tests performed such as titration of the water samples as well as determining the density of each sample would give a clear result as to which sample JAVRE was most similar to. After all testing performed there was an obvious results as to which water sample JAVRE came from. Test Results: Known Water Samples

Qualitative Test Results
Water Sample
Carbohydrates
Calcium
Phosphate
Proteins
Salicylic Acid
Jordan River
Negative
Negative
Positive
Negative
Negative
White River
Negative
Negative
Negative
Negative
Negative
Lake Monroe
Negative
Positive
Negative
Negative
Negative
Lake Lemon
Negative
Positive
Negative
Negative
Negative
Clear Creek
Negative
Negative
Positive
Negative
Negative

Absorbance of Known Water Samples
Water Sample
Absorbance at 650 nm
Jordan River
0.34
White River
0.01
Lake Monroe
0.02
Lake Lemon
0.01
Clear Creek
1.55

Titration Results of Known Water Samples
Water Sample
Trial 1
Trial 2
Lake Monroe
36.90 ml
37.39 ml
Lake Lemon
24.83 ml
25.07 ml

Density of Known Water Samples
Water Sample
Density (g/ml)
Lake Monroe
0.9922
Lake Lemon
1.0072

The qualitative results of the known water samples were tested multiple times showing a clear consistency of what was present in each sample. The tests for carbohydrates, proteins, and salicylic acid were shown to be useless for determining the identity of the unknown as they all tested negative as did the unknown. But the samples of the Jordan River and Clear Creek tested positive for phosphates in the qualitative testing as well as the quantitative testing of absorbance. If the two samples had not actually contained phosphate then they would not have resulted in such a high absorbance value and their samples would not have changed color during testing. With this data the known water samples could be eliminated down to Lake Monroe and Lake Lemon which were tested qualitatively to find which sample was the same as JAVRE. The titration of the two samples resulted in greatly different data that would ultimately prove which sample JAVRE is. As well as the density that was not as conclusive but also showed a clear indication of which sample JAVRE truly was. Test Results: Unknown Water Sample

Qualitative Test Results
Unknown
Carbohydrates
Calcium
Phosphate
Proteins
Salicylic Acid
JAVRE
Negative
Positive
Negative
Negative
Negative

Absorbance of Unknown Water Sample
Unknown
Absorbance at 650 nm
JAVRE
0.01

Titration Results of Unknown Water Sample
Unknown
Trial 1
Trial 2
JAVRE
35.7 ml
37.21 ml

Density of Unknown Water Sample
Unknown
Density (g/ml)
JAVRE
0.9938

The test results from the unknown sample were fairly clear. The qualitative tests were performed multiple times and each time showed a clear indication that there was calcium in the unknown sample. Also, there was no doubt that there were no carbohydrates present in the unknown either. The lack of phosphate in the water was not only proven through the qualitative test but also during the absorbance testing of the sample. If the qualitative test for phosphate in the unknown had been inaccurate then the absorbance of...
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