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2 marksPeriodic Table and Periodicity

CSEC Chemistry · May/June 2019 · Paper 2 · Question 4(b)(ii)

Figure 4 shows a part of the Periodic Table with some known elements and an unknown element, X. Mg, Ca and the unknown element X react with water.

Write a balanced chemical equation for the reaction between water and the unknown element (X).

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Other parts of this question

  1. 4(a)(i)Describe ONE simple test, including the observations, which could be used to distinguish between D and E.[2 marks]
  2. 4(a)(ii)Sketch a unit cell of sodium chloride.[3 marks]
  3. 4(a)(iii)State the type of bonding that occurs in sodium chloride.[1 mark]
  4. 4(b)(i)Discuss the relative reactivity of Mg, Ca and X with water.[2 marks]
  5. 4(c)(i)Suggest a formula for this compound.[1 mark]
  6. 4(c)(ii)State whether an aqueous solution of this compound would be acidic or basic and give ONE reason for your answer.[3 marks]
  7. 4(c)(iii)State ONE test to determine if an aqueous solution of this compound is acidic or basic.[1 mark]

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