1. Name a chemical that decomposes to form oxygen when it is heated
 
 
 
 

Question 1 of 22

2. 15g of copper foil is heated in a sealed test tube until the copper stops changing colour.
After the experiment had cooled the tube was opened and then re-weighed.

These were his results:

Mass of tube + copper before heating = 75gMass of tube after heating = 75.3gApproximately what mass of oxygen was in the tube?
 
 
 
 

Question 2 of 22

3. If hydrated copper sulphate is heated until it has all decomposed the solid product will: …..
 
 
 
 

Question 3 of 22

4. Pick a chemical that reacts with water
 
 
 
 

Question 4 of 22

5. Pick a black solid from the list below
 
 
 
 

Question 5 of 22

6. What chemical change will happen to copper foil when it is heated?
 
 
 
 

Question 6 of 22

7. Pick a chemical that decomposes when heated
 
 
 
 

Question 7 of 22

8. Pick a substance that burns with a bright white flame
 
 
 
 

Question 8 of 22

9. When copper foil is heated with a roaring bunsen flame and it quickly turns black.
What is the name of the black chemical formed?
 
 
 
 

Question 9 of 22

10. Which chemical will gain in mass when heated?
 
 
 
 

Question 10 of 22

11. What colour is sulphur?
 
 
 
 

Question 11 of 22

12. What colour is hydrated copper sulphate
 
 
 
 

Question 12 of 22

13. Pick a chemical that will not change in mass when heated
 
 
 
 

Question 13 of 22

14. Name a chemical that decomposes to release carbon dioxide when it is heated
 
 
 
 

Question 14 of 22

15. What colour is anhydrous cobalt chloride?
 
 
 
 

Question 15 of 22

16. Name a chemical that turns into a purple vapour when heated
 
 
 
 

Question 16 of 22

17. Which of these chemicals will sublime when heated?
 
 
 
 

Question 17 of 22

18. What colour is magnesium oxide
 
 
 
 

Question 18 of 22

19. Some copper foil is heated in a sealed test tube until the copper stops changing colour.
What colour does the copper become?
 
 
 
 

Question 19 of 22

20. If water is added to anhydrous copper sulphate what would be the colour of the product?
 
 
 
 

Question 20 of 22

21. What type of change happens when copper sulfate is heated?
 
 
 
 

Question 21 of 22

22. Some copper foil is heated in a sealed test tube until the copper stops changing colour. What gas is the copper reacting with?
 
 
 
 

Question 22 of 22