Reactions of acids
2 marks · HardSodium carbonate reacts with dilute hydrochloric acid.
Write the word equation for this reaction and name the gas produced.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
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sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide; carbon dioxide
Also accept: Word equation: sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide; Gas: carbon dioxide; Accept 'CO2' for the name of the gas
Common mistakes: Giving the wrong gas (e.g. hydrogen instead of carbon dioxide); Omitting water from the products
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Marking points
B1 · 1 mark · Correct word equation for the reaction between sodium carbonate and hydrochloric acid.
B1 · 1 mark · Correctly names the gas produced as carbon dioxide (accept CO2).
Worked solution
The reaction is:
sodium carbonate + hydrochloric acid → sodium chloride + water + carbon dioxide
The gas produced is carbon dioxide (CO2).