Lab Report

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Lab Report 1  Introduction: Proper chemical formulas entitle many challenges such as the Law of Multiple proportions that states that there may be more than one plausible mole ratio for the elements in that compound. However if we determine the mass of each element in the compound we will be able to get the true chemical formula. In this experiment, we used the law of definite proportions to find the chemical formula for a hydrated compound containing copper, chlorine, and water molecules locked in the crystal structure of the solid compound of Copper Chloride Hydrate. First we will gently heat a sample of the compound to drive off the water of hydration. By measuring the mass of the sample before and after heating we can determine…show more content…
It can cause painful burns if it comes in contact with the skin. 11. Use a glass stirring rod to scrape off as much copper as possible from the Al wire. Slide the wire up the wall of the beaker and out of the solution with the glass stirrer and rinse off any remaining copper with distilled water. If any of the copper refuses to wash off the aluminum wire, wash it with one or two drops of 6 M HCl solution. Put the Al wire aside. 12. Collect and wash the copper produced in the reaction. A) Set up a Büchner funnel for vacuum filtration. B) Obtain a piece of filter paper. Measure and record its mass, and then place the filter paper on the funnel. Start the vacuum filtration. C) Use small amounts of distilled water to wash all of the copper onto the filter paper on the Büchner funnel. Use the glass stirring rod to break up the larger pieces of copper. D) Wash the copper twice more with small amounts of distilled water. 13. Turn off the suction on the vacuum filtration apparatus. Add 10 mL of 95% ethanol to the copper on the filter paper and let it sit for about 1 minute. Turn the suction back on and let the vacuum filtration run for about five minutes. 14. Measure and record the mass of a clean, dry watch glass. Transfer the copper to the watch glass. Make sure that you have scraped all of the copper onto the watch glass. 15. Dry the watch glass of copper under a heat lamp or in a drying oven for five minutes. When the watch glass is

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