Identification of ions by chemical and spectroscopic means (chemistry only)

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Question 9
Medium

An analyst is examining a white mineral crust from a limestone cavern, which is believed to consist mainly of magnesium carbonate.

a.

How could the analyst test a sample of this solid mineral to show the presence of carbonate ions?

Complete the sentences by choosing the correct substance from the box below.

[ nitric acid, silver nitrate, limewater, sodium hydroxide, methyl orange ]

  • The substance added to the mineral sample to produce a gas is __________________
  • The gas produced is identified using __________________
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b.

When heated strongly, magnesium carbonate undergoes thermal decomposition:

magnesium carbonate(s)→magnesium oxide(s)+carbon dioxide(g)\text{magnesium carbonate}(s) \rightarrow \text{magnesium oxide}(s) + \text{carbon dioxide}(g)magnesium carbonate(s)→magnesium oxide(s)+carbon dioxide(g)

To heat the sample, the analyst uses a micro-burner that burns butane gas (C4H10\text{C}_4\text{H}_{10}C4​H10​).

Identify two ways in which carbon dioxide, a greenhouse gas, is released into the atmosphere during this experimental procedure.

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Identification of ions by chemical and spectroscopic means (chemistry only) Questions

  1. GCSE
  2. /Chemistry
  3. /Identification of ions by chemical and spectroscopic means (chemistry only)