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3 marksNon-Metals

CSEC Chemistry · January 2018 · Paper 2 · Question 6(c)

In some Caribbean islands, calcium hydrogen carbonate causes temporary hardness in water. This can be treated by the use of washing soda (sodium carbonate).

Write a balanced chemical equation, including state symbols, to show the removal of temporary hardness from water using this treatment.

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Other parts of this question

  1. 6(a)List FOUR unique properties of water as it relates to the human body.[4 marks]
  2. 6(b)Water exists in liquid, solid and gaseous states. Describe a laboratory test for water vapour.[2 marks]
  3. 6(d)Predict the ions that will migrate to the anode and cathode during the electrolysis of dilute sulfuric acid (acidified water). Write a balanced chemical…[6 marks]

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