4.6 Neutralisation and the reactions of acids
6 exam questions worth 9 marks. Write your answer, open the mark scheme, then give yourself the marks you earned. Your answers are saved on this device.
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What are the products when an acid reacts with a metal carbonate?
Choose one answer.
Correct Not quite: the answer is Salt, water and carbon dioxide
Mark scheme
D
Model answer
D: acid + metal carbonate → salt + water + carbon dioxide.
Name the salt formed when zinc oxide reacts with sulfuric acid.
Mark scheme
- zinc sulfate (1)
Model answer
Zinc sulfate.
Write a balanced symbol equation for the reaction of magnesium with hydrochloric acid.
Mark scheme
- correct formulae: Mg, HCl, MgCl2, H2 (1)
- Mg + 2HCl → MgCl2 + H2 (1)
Model answer
Mg + 2HCl → MgCl2 + H2
Describe the test for carbon dioxide and give the result.
Mark scheme
- bubble the gas through limewater (1)
- turns milky / cloudy (1)
Model answer
Bubble the gas through limewater; carbon dioxide turns it milky.
Write the ionic equation for neutralisation.
Mark scheme
- \mathrm{H^+} + \mathrm{OH^-} → H2O (1)
Model answer
\mathrm{H^+}(aq) + \mathrm{OH^-}(aq) → H2O(l)
Calcium hydroxide reacts with nitric acid.
Name the salt formed and give its formula. (Ions: \mathrm{Ca^{2+}}, \mathrm{NO_3^-})
Mark scheme
- calcium nitrate (1)
- Ca(NO3)2 (1)
Model answer
Calcium nitrate, Ca(NO3)2.
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