1. What method would be followed to prepare a sample of pure, dry lead (II) sulfate?

Question 1 of 21

2. What is the universal indicator colour of a pH 0-3 solution?

Question 2 of 21

3. Describe the method to prepare a pure dry sample of sodium chloride (soluble salt)

Question 3 of 21

4. 7.485 g of a hydrated copper(II) sulphate CuSO₄.xH₂O was heated producing 4.785g of anhydrous copper(II) sulphate. What is the formula of the hydrated salt?

Question 4 of 21

5. Describe an experiment to prepare a pure, dry sample of an insoluble salt, starting from two soluble reactants

Question 5 of 21

6. An acid is called a proton _________

Question 6 of 21

7. If iron chloride has the formula FeCl₃, what is the formula of the iron ion?

Question 7 of 21

8. Is iron (III) hydroxide acidic or basic?

Question 8 of 21

9. In a flame test, a yellow colour is seen. Give the formula of the cation which is present.

Question 9 of 21

10. What is an acid?

Question 10 of 21

11. In a flame test, why is hydrochloric acid used?

Question 11 of 21

12. What is defined as a proton acceptor?

Question 12 of 21

13. In the test for sulfate ions, what result shows they are present?

Question 13 of 21

14. What is a base?

Question 14 of 21

15. When NaOH is added to a sample, a brown precipitate forms. What cation was present in the sample?

Question 15 of 21

16. sulfuric acid + copper oxide →

Question 16 of 21

17. What is the pH of a strong acid?

Question 17 of 21

18. Describe the test for chlorine gas

Question 18 of 21

19. When preparing hydrated copper(II) sulfate crystals starting from copper(II) oxide, why is the acid gently heated?

Question 19 of 21

20. Is ammonium chloride soluble?

Question 20 of 21

21. A pure, dry sample of a soluble salt can be prepared starting with an insoluble reactant. What is this method called?

Question 21 of 21