Questions
1. Alongside the names of various chemicals are shown their respective pH values in aqueous
solution.
Potassium hydroxide pH13, hydrogen bromide pH2, calcium hydroxide pH11, sodium chloride
pH7, hydrogen chloride pH2, magnesium hydroxide pH10, citric acid pH4.
Which of these substances is/are:
a) strong acid ?
b) weak acid ?
c) strong alkali ?
d) weak alkali ?
e) neutral substance?
In each case write a chemical equation to show the ion present in solution.
2.a) What makes a weak acid ? Give two examples
b) What makes a strong alkali ? Give two examples
3. Write a balanced chemical equation to represent the neutralisation of sulfuric acid with
sodium hydroxide.
4. Write a chemical equation of hydrochloric acid with sodium hydroxide.
5. How can you test for the presence of water ?
6. Explain what this symbol
means ? Give examples.
7. Write balanced chemical equations for the following soluble salt preparations:
a) magnesium + sulfuric acid 
b) calcium carbonate + hydrochloric acid 
c) zinc oxide + hydrochloric acid 
d) potassium hydroxide + nitric acid 
pH of solution:
1
(a)
14
Colour of universal indicator:
(b)
green
(c)
Description:
strong acid
(d)
(e)
9) The following equation shows the reaction that takes place between an acid and an alkali:
a) Name this type of reaction.
b) Write a word equation that shows the reaction between nitric acid and potassium
hydroxide.
c) Write a symbol equation for the same reaction.
10) Complete the following equations:
a) calcium carbonate + nitric acid 
b) sodium carbonate + sulfuric acid 