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Unformatted text preview: Derek Clary Ta: Ryan Chem 1AL R:6-850 10/24/10 Discussion The purpose of this experiment was to observe the reactivity of metals with water and acid. Also, the lab introduced acid-base titration as a method to determine the molecular formula of a compound. In this lab, when Zinc and Calcium are mixed with HCl in a test tube and then a flame is held over the mouth of the test tube, reactions occur. When zinc and 6M HCl are combined and the flame is over the test tube, the metal fizzes and then a pop noise resulted. When calcium and .02M HCl are combined and a flame is held over the test tube, the combination turns white, gets hot, smoke becomes visible, and then a louder pop noise than zinc resulted. When zinc and calcium were mixed with water, there was no flame held over the test tube. When zinc and water were mixed, there was no apparent reaction. In the calcium and water reaction, two drops of .1% phenolphthalein indicator was added to the solution. When calcium and water mixed the tube got hot, the solution fizzled, smoke was visible, and the solution turned...
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- Spring '07
- Van Koppen