1. What is a base?

Question 1 of 21

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

Question 2 of 21

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

Question 3 of 21

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

Question 4 of 21

5. What is an alkali?

Question 5 of 21

6. hydrochloric acid + sodium hydroxide →

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7. What is the universal indicator colour of a strongly acid solution?

Question 7 of 21

8. A pure, dry sample of a soluble salt can be prepared starting from an acid and alkali. What are the two stages of this method called?

Question 8 of 21

9. Is calcium sulfate soluble?

Question 9 of 21

10. What is defined as a proton donor?

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11. An alkali is called a proton _________

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

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13. State the formula of the nitrate ion

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14. With universal indicator, what is the pH of a green solution?

Question 14 of 21

15. State the steps for calculating empirical formula

Question 15 of 21

16. What is an alkali compared to a base?

Question 16 of 21

17. Nitric acid and silver nitrate are added to a solution containing chloride ions. Describe the result.

Question 17 of 21

18. Describe the test for oxygen gas

Question 18 of 21

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

Question 19 of 21

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

Question 20 of 21

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

Question 21 of 21