2021 ASSESSMENT
MATERIALS
GCSE
CHEMISTRY
Chemistry Test 2: Chemical changes (Higher)
Your text here 1
Total number of marks: 36
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, 2
alkaline
Ca(no3)2
Your answer should include the following:
Suitable acid: sulfuric acid.
Suitable substance: magnesium oxide/magnesium carbonate/magnesium
hydroxide/magnesium.
Equation for reaction:
o MgO + H2SO4 → MgSO4 + H2O
o or Mg[OH]2 + H2SO4 → MgSO4 + 2H2O
o or MgCO3 + H2SO4 → MgSO4 + H2O + CO2
o or Mg + H2SO4 → MgSO4 + H2
Warm acid solution.
Add solid reactant to acid until in excess solid remains (oxide and hydroxide)/add
solid a little at a time until there are no more bubbles (carbonate and metal).
Filter off the excess solid, pour remaining solution into an evaporating basin.
Heat the solution/leave the water to evaporate until pure salt crystals form and then
dry salt crystals with absorbent paper/leave to dry.
This study source was downloaded by 100000832361371 from CourseHero.com on 02-08-2022 05:40:20 GMT -06:00
https://www.coursehero.com/file/92761195/AQA-8462H-T2-Q-AM-2021DOCX/
MATERIALS
GCSE
CHEMISTRY
Chemistry Test 2: Chemical changes (Higher)
Your text here 1
Total number of marks: 36
Permission to reproduce all copyright material has been applied for. In some cases, efforts to contact copyright-holders may have been
unsuccessful
This study and AQA will
source was downloaded bybe happy to rectifyfrom
100000832361371 any CourseHero.com
omissions of acknowledgements. If you
on 02-08-2022 05:40:20 have
GMT any queries please contact the
-06:00
Copyright Team.
Copyright © 2021 AQA and its licensors. All rights reserved
https://www.coursehero.com/file/92761195/AQA-8462H-T2-Q-AM-2021DOCX/
, 2
alkaline
Ca(no3)2
Your answer should include the following:
Suitable acid: sulfuric acid.
Suitable substance: magnesium oxide/magnesium carbonate/magnesium
hydroxide/magnesium.
Equation for reaction:
o MgO + H2SO4 → MgSO4 + H2O
o or Mg[OH]2 + H2SO4 → MgSO4 + 2H2O
o or MgCO3 + H2SO4 → MgSO4 + H2O + CO2
o or Mg + H2SO4 → MgSO4 + H2
Warm acid solution.
Add solid reactant to acid until in excess solid remains (oxide and hydroxide)/add
solid a little at a time until there are no more bubbles (carbonate and metal).
Filter off the excess solid, pour remaining solution into an evaporating basin.
Heat the solution/leave the water to evaporate until pure salt crystals form and then
dry salt crystals with absorbent paper/leave to dry.
This study source was downloaded by 100000832361371 from CourseHero.com on 02-08-2022 05:40:20 GMT -06:00
https://www.coursehero.com/file/92761195/AQA-8462H-T2-Q-AM-2021DOCX/
