4 marksFoundation5.2.1.2 Ionic bonding5.2.1.1 Chemical bonds
Magnesium reacts with oxygen to form magnesium oxide, an ionic compound.
The electron structure of magnesium is 2,8,2 and of oxygen is 2,6.
.1Describe what happens to the electrons when magnesium reacts with oxygen.
[2 marks] .2What are the charges on the ions in magnesium oxide?
[1 mark] .3Name the type of force that holds the ions together.
[1 mark] 4 marksFoundation5.3.1.2 Relative formula mass
Relative atomic masses
(Ar): H = 1, C = 12, O = 16, Mg = 24, Cl = 35.5
.1Calculate the relative formula mass
(Mr) of water,
H2O. .2Calculate the
Mr of carbon dioxide,
CO2. .3Calculate the
Mr of magnesium chloride,
MgCl2. 3 marksFoundation5.4.2.2 Neutralisation of acids and salt production5.4.2.1 Reactions of acids with metals
Acids react with metals, bases and carbonates to make salts.
.1Name the salt made when magnesium oxide reacts with hydrochloric acid.
[1 mark] .2Name the salt made when sodium hydroxide reacts with sulfuric acid.
[1 mark] .3Name the gas produced when calcium carbonate reacts with hydrochloric acid.
[1 mark] 4 marksFoundation5.1.2.5 Group 1
A teacher adds a small piece of lithium to a trough of water containing universal indicator.
.1Give two observations the students would see.
[2 marks] .2Complete the word equation: lithium + water → lithium hydroxide + ______
[1 mark] .3The teacher repeats the demonstration with potassium. Predict how the reaction compares.
[1 mark] 4 marksFoundation5.4.3.2 Electrolysis of molten ionic compounds5.4.3.1 The process of electrolysis
Molten zinc chloride is electrolysed using inert electrodes.
.1Explain why the zinc chloride must be molten.
[2 marks] .2Name the product at the cathode.
[1 mark] .3Name the product at the anode.
[1 mark] 