Copper and its compounds

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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

Group	Copper turnings (g)	Zinc (g)	Product (g)	Experimental Yield (%)	Notes
1	-	4.8	1.46	-	A small amount of product was lost when decanting during step 3
2	1.53	4.98	1.20	78.4	Spilt a little of the reactants while decanting
3	1.78	5.25	1.08	60.7	Some of the solution was spilled while transferring to evaporating dish
4	1.54	5.00	2.59	168.2	Errors may have occurred during the distillation process and the drying process
5	1.5	5	1.49	99.3	Some unreacted zinc left in the sample due to limited surface area of contact with the sulphuric acid
6	1.54	5.01	1.52	98.1	No spillages