5. Chemical Changes

Question 1

1. What is produced when a metal reacts with oxygen?

Answer 1

1. Metal oxide

Question 2

2. What is the name given to this type of reaction (addition of oxygen).

Answer 2

2. Oxidation

Question 3

3. What is the reactivity series?

Answer 3

3. Order of elements from the most to least reactive

Question 4

4. If a metal is reacted with a compound with a less reactive metal in it what will happen?

Answer 4

4. The more reactive metal will displace the less reactive metal from the compound

Question 5

5. Why are some metals more reactive than others?

Answer 5

5. They form positive ions more easily

Question 6

6. What is produced when a metal reacts with an acid?

Answer 6

6. A salt

Question 7

7. What is a base?

Answer 7

7. A metal oxide or metal hydroxide

Question 8

8. When is produced when an acid reacts with a base?

Answer 8

8. A salt + water

Question 9

9. What is an alkali?

Answer 9

9. A base which dissolves in water (is soluble)

Question 10

10. What salt would be made in the reaction between sodium hydroxide and hydrochloric acid?

Answer 10

10. Sodium chloride

Question 11

11. What type of salt is made if sulphuric acid is used?

Answer 11

11. A sulphate

Question 12

12. What is made when an acid reacts with a carbonate?

Answer 12

12. A salt + water + carbon dioxide

Question 13

13. What is the pH of a strong acid?

Answer 13

13. 1

Question 14

14. What is the pH of a neutral solution?

Answer 14

14. 7

Question 15

15. What ions do acids release in solutions?

Answer 15

15. H+

Question 16

16. What ions do alkalis release in solutions?

Answer 16

16. OH-