1
1
The salt magnesium chloride can be prepared by reacting hydrochloric acid with magnesium oxide.
The method for preparing pure dry crystals of magnesium chloride is given.
Complete the missing steps 4 and 6.
1
Add excess magnesium oxide to dilute hydrochloric acid.
2
Warm the mixture to complete the reaction.
3
Filter off the excess magnesium oxide and collect the filtrate.
4
.......................................................................................................................................
5
Remove the crystals.
6
.......................................................................................................................................[2]
[Total: 2]
2
The salt zinc chloride can be prepared by reacting hydrochloric acid with zinc oxide.
Choose the type of reaction that occurs.
Draw a circle around your answer.
addition
neutralisation
polymerisation
reduction
..................................................................................................................................................
[1]
[Total: 1]
3
Name the compound formed when sulfuric acid reacts with ammonia.
..................................................................................................................................................
[1]
[Total: 1]
4
When NaOH(aq) is added to aqueous iron(III) chloride, FeCl3(aq), a solid product is formed.
Name the type of reaction where a solid is formed from two solutions.
..................................................................................................................................................
[1]
[Total: 1]
5
A student prepares magnesium sulfate crystals, MgSO4, by adding excess magnesium to dilute
sulfuric acid.
Describe two observations which show the reaction has finished.
1 ...............................................................................................................................................
2 ...............................................................................................................................................
[2]
2
[Total: 2]
6
Aqueous potassium hydroxide reacts with a dilute acid to produce aqueous
potassium chloride, KCl(aq), which is a salt.
(a) Name the dilute acid used.
...........................................................................................................................................
[1]
(b) State the type of reaction taking place.
...........................................................................................................................................
[1]
(c) Name the experimental technique used when salts are made by reacting a dilute acid with an
aqueous alkali.
...........................................................................................................................................
[1]
[Total: 3]