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1 markCharacteristics of Metals

CSEC Chemistry · January 2014 · Paper 2 · Question 5(c)(i)

R and T are metals with an oxidation state of +2. The hydroxide of T is heat stable, but the hydroxide of R decomposes to produce the oxide and water.

Write a balanced chemical equation to show the action of heat on the hydroxide of R.

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Other parts of this question

  1. 5(a)(i)Name the TWO by-products.[2 marks]
  2. 5(a)(ii)a)Write balanced ionic equations for the production of chlorine.[2 marks]
  3. 5(a)(ii)b)Write balanced ionic equations for the production of ONE of the named by-products in (i) above.[2 marks]
  4. 5(b)(i)Identify TWO physical processes by which water leaves the atmosphere and ONE physical process by which water enters the atmosphere.[3 marks]
  5. 5(b)(ii)Explain ONE way in which this may affect the water cycle.[2 marks]
  6. 5(c)(ii)Predict what will happen to the carbonates of R and T when heated strongly.[2 marks]
  7. 5(c)(iii)State a reason why it is more likely to find R rather than T combined with other substances in nature.[1 mark]

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