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Investigate the reaction of Calcium with Water.

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Kriston Moore 11AT March 14th, 2007 Chemistry Lab Report EXPT 6: Reaction of Calcium with Water Skill C: Handling Experimental Observation and Data Purpose: To react calcium with water and graph the results to determine the interval of time over which the reaction rate was fastest and slowest Apparatus and Materials: 1) Measuring cylinder 2) Trough 3) Calcium 4) Water Method: 1) Add a piece of calcium to water in a trough 2) Collect hydrogen gas evolved using an inverted measuring cylinder 3) ...read more.


Discussion: Possible Sources of Error: 1) Parallax error- I may have read the level of water in the measuring cylinder incorrectly because it was inverted and I may have not been looking parallel to the markings. 2) Experimenter's error- My reaction time in recording the results may not have been quick enough which would cause an incorrect reading in time. 3) Experimenter's error- The trough was not cleaned before usage, and tap water was used in the experiment instead of distilled water. The fact that the apparatus may have contained impurities may have affected the results. ...read more.


As the calcium reacted, more hydrogen was produced, and the water level in the measuring cylinder decreased because of the hydrogen displacing the water. At the end of the reaction, the calcium dissolved in the water leaving an aqueous solution of calcium hydroxide. 2Ca(s) + 2H20(l) 2Ca(OH)2(aq) + H2(g) Calcium Water Calcium Hydroxide Hydrogen Conclusion: The rate of reaction was fastest in the first 40 seconds and slowest in the last 40 seconds. This shows that as the reaction went on, the products were used up and the rate of reaction was slowed down. Time/sec Volume of H2/cm 0 0 40 1.5 80 2.5 120 3.2 160 3.7 200 3.8 240 3.8 ...read more.

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