Acids react with metals, bases and carbonates to make salts.
.1
Name the salt made when magnesium oxide reacts with hydrochloric acid.
[1 mark]
.2
Name the salt made when sodium hydroxide reacts with sulfuric acid.
[1 mark]
.3
Name the gas produced when calcium carbonate reacts with hydrochloric acid.
[1 mark]
3 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
A student adds small pieces of four metals to dilute hydrochloric acid and to water.
Table: metal A reacts vigorously with acid and slowly with water; metal B reacts slowly with acid and not with water; metal C does not react with either; metal D reacts vigorously with water.
Metal
With dilute acid
With water
A
Vigorous fizzing
Slow bubbles
B
Slow bubbles
No reaction
C
No reaction
No reaction
D
Too dangerous to try
Vigorous fizzing, melts
.1
Use the results to put the metals in order of reactivity, most reactive first.
[1 mark]
.2
Which metal could be copper?
[1 mark]
.3
Complete the word equation: magnesium + hydrochloric acid → magnesium chloride + ______
[1 mark]
4 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Relative atomic masses (Ar): H = 1, C = 12, O = 16, Mg = 24, Cl = 35.5
.1
Calculate the relative formula mass (Mr) of water, H2O.
[1 mark]
.2
Calculate the Mr of carbon dioxide, CO2.
[1 mark]
.3
Calculate the Mr of magnesium chloride, MgCl2.
[2 marks]
3 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Humans use the Earth's resources for food, warmth, shelter and transport.
.1
Which resource is finite?
[1 mark]
.2
Define potable water.
[1 mark]
.3
Name one substance or method used to sterilise water.
[1 mark]
4 marksFoundation
Spec and skills
Original practice question
Answer and supported method checks
Pure aluminium is soft. Aircraft bodies are made from aluminium alloys.
.1
Explain why pure aluminium is soft.
[2 marks]
.2
Explain why aluminium alloys are harder than pure aluminium.
