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Copper forms two oxides, Cu2O and CuO - AQA - GCSE Chemistry - Question 8 - 2019 - Paper 1
Question 8
Copper forms two oxides, Cu2O and CuO. A teacher investigated an oxide of copper. Figure 10 shows the apparatus. This is the method used. 1. Weigh empty tube A. ... show full transcript
Worked Solution & Example Answer:Copper forms two oxides, Cu2O and CuO - AQA - GCSE Chemistry - Question 8 - 2019 - Paper 1
Step 1
Step 2
Step 3
Determine the mass of copper and the mass of water produced in this experiment.
Answer
From Table 5:
The mass of tube A and oxide of copper before heating is 115.47 g. The mass after heating for 2 minutes is 114.62 g.
Mass of copper produced:
Mass before heating - Mass after heating = 115.47 g - 114.62 g = 0.85 g.
Mass of water produced can be found as follows:
Mass of tube B and contents at the start: 120.93 g. Total mass at the end: 123.38 g.
Mass of water = Mass of tube B and contents at the end - Mass of tube B and contents at the start = 123.38 g - 120.93 g = 2.45 g.
Thus, the mass of copper is 0.85 g and the mass of water is 2.45 g.