Solubility - Solubility Purpose The purpose of the...

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Solubility Purpose: The purpose of the following experiments is to determine the solubility of solid compound substances in different solvents. Procedure: Experiment Part A: 1. A measurement of 0.040g of benzophenone was added to 4 dry test tubes. 2. 1mL of de-ionized was place in the first test tube, 1mL of methyl alcohol was placed in the second test tube, 1mL of hexane was placed in the third test tube and the fourth was left with no addition to serve in order to serve as the control and reference comparison. 3. Each test tube that had a liquid added was then stirred with the rounded end of a micro spatula for 60 seconds. 4. After stirring each compound, it was then observed to see if the substances dissolved and was compared to the control test tube. Calculations: 1. Each test tube contained 0.040g of benzophenone and test tube 1 contained 1mL of de-ionized water, test tube 2 contained 1mL of methyl alcohol, test tube 3 contained 1mL of hexane and test tube 4 was left without a liquid added to serve as control. Possible Errors: 1. A possible error could be the scale used to measure the benzophenone may not have been as accurate in its assessment of weight. (It may be unknowingly broken). 2. Another possible error could be that the graduated cylinders used to measure the added liquids may not have been accurate in their measurement and may not have been consistent in the measurement as different graduated cylinders were used for measuring the liquids. Conclusion: 1. Benzophenone and water produced an insoluble reaction. The solute (benzophenone) still looked as it did before, like tiny, loose particles much like the control substance in comparison. 2. Benzophenone and methyl alcohol produced a partially dissolved reaction. The benzophenone was clumped together into larger chunks, but only 50% of the substance remained in the test tube.
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