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Reactions of Copper and its compounds

The exercise of this experiment is for students to practice their scientific report writing skills through the submission of a partial practical report.


I will list some of the groups' mass measurements below when we collect them.
Table 1: Experimental Masses 2013
Copper Turnings (g) Zinc (g) Evaporating Dish (g) Evaporating Dish + Product (g) Product (g)
Group 1 1.55 5.1 43.65 45.10 1.45
Group 2 1.58 5.15 54.29 55.8 1.5
Group 3 1.61 5.05 39.66 42.10 2.44
Group 4 1.57 5.00 29.29 30.68 1.39
Group 5 1.58 5.03 60.03 62.24 wet 2.21
Group 6 1.595 5.06 59.63 60.18 unreacted zinc 0.55
Table 2: Experimental Masses 2014
GroupCopper turnings (g)Zinc (g)Product (g)Experimental Yield (%)Notes
1-4.81.46-A small amount of product was lost when decanting during step 3
21.534.981.2078.4Spilt a little of the reactants while decanting
31.785.251.0860.7Some of the solution was spilled while transferring to evaporating dish
41.545.002.59168.2Errors may have occurred during the distillation process and the drying process
51.551.4999.3Some unreacted zinc left in the sample due to limited surface area of contact with the sulphuric acid
61.545.011.5298.1No spillages
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