Download Topic 9 HW – Metals and Alloys PART A 1. The grid shows the

Topic 9 HW – Metals and Alloys
PART A
1. The grid shows the names of some metals.
A.
COPPER
B.
MAGNESIUM
C.
ZINC
D.
BRASS
E.
SODIUM
F.
STEEL
a) Identify the metal used to galavanise steel objects.
b) Identify the metal which produces the yellow in a street lamp. (You may wish to use page 4 of the data book)
c) Identify the two alloys.
(4 marks)
2. Gold and silver are both used to make jewellery. Identify the statement(s) which are true for both gold and silver.
A.
B.
C.
D.
E.
They are NOT transition metals.
They conduct electricity.
They are found uncombined in the Earth’s crust.
They react with dilute hydrochloric acid.
They are more reactive than copper.
(2 marks)
3. Metals and their compounds take part in many reactions.
A.
B.
C.
D.
Fe2O3 + 3CO
2Mg + SiO2
CuCO3
2Zn + O2
2Fe + 3CO2
2MgO + Si
CuO + CO2
2ZnO
a) Identify the reaction which takes place in the blast furnace.
b) Identify the reaction which produces a non-metal element.
(2 marks)
4. Leia was investigating electrical conductivity. She set up four experiments.
Identify the experiment in which the bulb wouldn’t light.
(1 mark)
5. Kevin was investigating corrosion. He set up four experiments as shown in the grid below.
Identify the experiment in which corrosion of the nail was most rapid.
(1 mark)
PART B
6. Wilma investigated the reaction of metals R, S and T with water.
a) Place the metals in order of reactivity (most reactive first).
b) How would Wilma test the gas to show that is was hydrogen?
(2 marks)
7. The diagram shows some ways in which iron can be protected from rusting.
a) Name a metal which is suitable for sacrificial protection of iron.
b) How does painting protect iron from rusting?
c) Alloys of iron are called steels. Name another alloy.
(3 marks)
8. A simple cell can be made from everyday objects.
a) What will be the direction of electron flow through the wires?
b) What would happen to the voltage if the iron nail was replaced with aluminium foil? You may wish to use
page 7 of the data book to help you.
(2 marks)
9. Metals can be extracted from their ores by different methods.
a) Copy the table and place the following methods in the correct space in the table.
Reacting with Carbon
Electrolysis
Heat alone.
METAL
Mercury
Iron
Magnesium
METHOD
b) Mercury can be extracted from the ore cinnabar, HgS. Calculate the percentage by mass of mercury in
cinnabar.
(3 marks)
TOTAL = 20 Marks