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chem2 - Lab#3-Analysis of Water Pre Lab Questions see...

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Lab #3-Analysis of Water Pre Lab Questions : see attached sheet Introduction : The purpose of the lab is to find the concentration of solids in tap water, ocean water, and deionized water. Also, the lab introduces solubility rules of different types of ionic compounds in water. Data : The following are steps that were used for the lab: Part 1: 1. We placed a clean dry beaker in the oven for 20 minutes. 2. Next we removed the beaker from the oven, and allowed it to cool to room temperature. 3. We then put 2-3 boiling stones in the beaker and it weighed 67.05 g. 4. We measured about 50mL of ocean water and it weighed 99.8 g. 5. We then heated water until 15 mL was left and wait for the water to evaporate. 6. We then added DI water into the cooled beaker and observed the color of the residue. 7. Next, we weighed the beaker with residue inside and the beaker was placed back in the oven for 15 minutes. Then cool it to room temperature and was reweighed. 8. Lastly, the percent total solids in ocean water was calculated as well as the total solids in parts per million.
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