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5 marksAcids, Bases and Salts

CSEC Chemistry · May/June 2015 · Paper 2 · Question 4(a)(i)

Tums® and Epsom salts are common household medicines. Calcium carbonate is the main active ingredient in Tums®, an antacid.

Describe ONE method for the preparation of dry calcium carbonate in the laboratory. In your answer, include an equation for the reaction as well as the steps that are involved in its preparation.

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Other parts of this question

  1. 4(a)(ii)The main ingredient in Epsom salts is magnesium sulfate. List ONE use of Epsom salts.[1 mark]
  2. 4(a)(iii)In order to effectively use Epsom salts, it is usually made into a solution. Explain why water molecules are able to dissolve Epsom salts.[3 marks]
  3. 4(b)Describe how permanent hard water is formed. Include balanced chemical equations with state symbols to illustrate this process.[6 marks]

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