2. a) Explain what you understand by the term

3. i-an acid

4. ii-a base

5. iii-an alkali

7. An alkali is a compound that produces hydroxide ions in the

8. presence of water

9. A base is a compound that produces hydroxide ions in water

10. A base is a compound that neutralises an acid and produces a salt

11. and water

12. Six solutions A,B,C,D,E and F with concentration of 1.0 mol dm-3, have pH values as shown in the table below :

13. SolutionABCDEFpH values137.0104.01.03.0

14. Which of the above solutions has

15. i-the highest concentration of H+ ions

16. ii- the highest concentration of OH- ions

17. Which of the above solutions is

18. i-a strong acid?

19. ii-a strong alkali?

20. iii-a weak acid?

21. iv-a weak alkali?

22. Which of the above solutions may be

23. i-ethanoic acid?

24. ii-hydrochloric acid?

25. iii-aqueos ammonia?

26. iv-sodium hydroxide solution?

27. ANSWERS

29. ii-E

30. iii-C

31. iv-A