AQA GCSE Chemistry (8462), Higher tier · Chemical changes › Reactions of acids
Practise Reactions of acids with metals. 12 exam-style questions on this subtopic, at up to four difficulty levels, with full mark schemes and a progress tracker. Free, no account needed.
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Complete the word equation. zinc + hydrochloric acid → .................... + hydrogen
zinc chloride
Write a balanced symbol equation for the reaction of magnesium with dilute sulfuric acid.
Mg + H2SO4 → MgSO4 + H2
Zinc reacts with dilute hydrochloric acid: Zn(s) + 2HCl(aq) → ZnCl2(aq) + H2(g) Write the ionic equation for this reaction.
Zn + 2H+ → Zn2+ + H2
Complete the word equation. aluminium + sulfuric acid → .................... + ....................
aluminium sulfate + hydrogen
Magnesium reacts with dilute hydrochloric acid. Bubbles of gas form and the magnesium disappears. Name the salt produced.
magnesium chloride
Sample questions
Written for this site in the style of AQA exam questions. They are not taken from real past papers.
Question 1Easy4 marks
Acids react with some metals to produce a salt and hydrogen.
(a) Complete the word equation. zinc + hydrochloric acid → .................... + hydrogen[1]
(b) Describe the test for hydrogen and give the result.[2]
(c) Name the salt formed when iron reacts with dilute sulfuric acid.[1]
Show the answer and mark scheme
(a)Answer: zinc chloride
zinc chloride
(b)
put a burning / lit splint at the mouth of the test tube
(burns with a) squeaky pop
(c)Answer: iron(II) sulfate
iron(II) sulfate / iron sulfate
Question 2Medium6 marks
Magnesium, zinc and iron all react with dilute hydrochloric acid and dilute sulfuric acid.
(a) Write a balanced symbol equation for the reaction of magnesium with dilute sulfuric acid.[1]
(b) Balance the equation for the reaction of iron with hydrochloric acid. Fe + ....HCl → FeCl2 + H2[1]
(c) A student added equal-sized pieces of magnesium, zinc and iron to separate test tubes containing the same volume of the same dilute hydrochloric acid. Describe how the observations would be different for the three metals.[3]
(d) Explain why copper does not react with dilute hydrochloric acid.[1]
Show the answer and mark scheme
(a)Answer: Mg + H2SO4 → MgSO4 + H2
Mg + H2SO4 → MgSO4 + H2
(b)Answer: Fe + 2HCl → FeCl2 + H2
2 (HCl)
(c)
magnesium fizzes most vigorously / produces bubbles fastest
zinc fizzes steadily / less than magnesium
iron produces bubbles slowly / least vigorous
(d)
copper is less reactive than hydrogen (so cannot displace it from the acid)