Redox chemistry exercises

Watch each video then attempt the following:

  • record any observations made during the reaction
  • Explain how the observations for each reaction relates to the species involved
  • Write balanced half and overall reactions

Hand in your work tomorrow for checking. At the very least you should be able to complete the observations

(1) A redox reaction between copper metal and 50% nitric acid containing nitrate ions

(2) A redox reaction between chlorine and and iron(II) ions

(3)Redox reaction between dichromate ions and sulphite ions.

(4) A redox reaction between chlorine and iodide ions

AS 91164 Structure and bonding:Practice question 1

The structurfe of quartz

Silicon and oxygen atoms are arranged in a three dimensional covalent network. A portion of such a framework is shown here. In this arrangement, the stoichiometry is reduced to SiO2, (each silicon has a half share of four oxygens) which is often called silica. A collection of small pieces of quartz is sand.

Tackle both questions on quartz and zinc below.

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