Discussionex3 - These errors may have lead to inaccurate...

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Discussion: In part 1 we did a physical analysis of water through experimentation. We did this by boiling water and letting it evaporate away, leaving behind residue of substances that were in the water. We measured the weight of the residue in the beaker and then put the beaker inside an oven in order to get rid of water which may not have evaporated away through the boiling process. In this part we did a physical analysis of two different types of water, tap water and ocean water. We found that the ocean water had much more solids in it at 3.11g than tap water which had .45g solid residue. Some sources of error may have been air conditioning causing the scale to give an off reading, and some of the solid residue having been taken away by the evaporation of the water.
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Unformatted text preview: These errors may have lead to inaccurate measurements and results. In part 2 we did a chemical analysis of water through experimentation. We achieved this by using various chemicals to determine if certain ions were present in the water sample. We did a test for nitrate, calcium and magnesium, chloride, sulfate, and lead ions. Through this experiment we determined that nitrate, calcium and magnesium, chloride, and sulfate ions were present in the water sample but that lead was not. Sources of error may include inaccurate measurements of chemicals, and adding of too much or too little of the chemicals, leading to false results....
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This note was uploaded on 03/14/2010 for the course CHEM 109A 109A taught by Professor Aue during the Spring '09 term at UCSB.

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