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2 marksGroup VII Elements

CAPE Chemistry Unit 1 · 2021 · Paper 2 · Question 1(c)(iv)

A student investigates the relative oxidizing ability of the Group VII element chlorine.

Write relevant half equations to illustrate the chemical changes that occur with EACH element used to carry out the investigation.

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Other parts of this question

  1. 1(a)(i)Define the term 'radioactive isotope'.[1 mark]
  2. 1(a)(ii)Give the names and symbols for TWO other forms of radioactive emissions.[2 marks]
  3. 1(a)(iii)List THREE uses of radioactive isotopes.[3 marks]
  4. 1(a)(iv)Determine the value of A and Z in the equation: ^{241}_{95}\text{Am} \rightarrow \text{ }^{A}_{Z}\text{Np} + \text{ }^{4}_{2}\text{He} + \text{energy}[2 marks]
  5. 1(b)The element rhenium consists of two isotopes ^{185}\text{Re} and ^{187}\text{Re}, in the atomic ratio of 2:3. Calculate the relative atomic mass of rhenium to…[2 marks]
  6. 1(c)(i)List TWO chemicals and ONE piece of apparatus that the student may use to carry out the investigation.[3 marks]
  7. 1(c)(ii)Describe ONE physical change that the student may observe while carrying out the investigation.[1 mark]
  8. 1(c)(iii)Identify the oxidizing agent that the student may use while conducting the investigation.[1 mark]
  9. 1(d)(i)Define the term 'Molar mass'.[1 mark]
  10. 1(d)(ii)Define the term 'Mole'.[1 mark]
  11. 1(e)(i)Calculate the original number of moles of NaOH in 100 cm³ of 0.500 mol dm⁻³ aqueous sodium hydroxide.[2 marks]
  12. 1(e)(ii)Calculate the number of moles of HCl in 27.3 cm³ of 0.600 mol dm⁻³ hydrochloric acid.[2 marks]
  13. 1(e)(iii)Deduce the number of moles of unreacted NaOH neutralized by the hydrochloric acid.[1 mark]
  14. 1(e)(iv)Calculate the number of moles of NaOH which reacted with the ammonium sulfate.[2 marks]
  15. 1(e)(v)Use your answer in (e)(iv) to calculate the number of moles and the mass of ammonium sulfate in the sample.[3 marks]
  16. 1(e)(vi)Write the ionic equation, including physical states, for the reaction between ammonium sulfate and aqueous sodium hydroxide.[1 mark]

More practice: the rest of this paper · more Group VII Elements questions · all CAPE Chemistry Unit 1 past papers