Do we need to know How Science works pages for OCR AS Chemistry exam?

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E.g do we need to know about the detail of people constructing the history of the atom for the exam or is that just for extended knowledge?

Posted Wed 31st October, 2012 @ 11:38 by Terrie

2 Answers

  • 1 vote

Hi, I'm doing the 'Chemistry A H034' specification. You need to know any knowledge about chemistry that relates to these 'How Science Works' pages. You would not need to know the people behind the old models of the atom, but you would need to be able to explain the chemistry behind Rutherford's correct model of the atom, in terms of the properties of neutrons,protons and electrons. So for example in the specification 'Chemistry A H034' it says:

  • Health benefits of chlorine use in water;
  • Ethical implications of adding chlorine to public water supplies(also fluorine in drinking water).

You would need to know the chemistry behind why chlorine is added to water i.e. it kills the bacteria in the water and the chemistry behind why some do not welcome the adding of chlorine to water i.e. it sometimes reacts with organic matter to form traces of chlorinated hydrocarbons, suspected of causing cancer. So you wouldn't need to know that in 1991 the Peruvian stopped adding Chlorine to their drinking water, for example.

I hope this helps :)

Uzo

Answered Wed 2nd January, 2013 @ 17:37 by Former Member
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Oh ok, thanks Uzo!

Answered Wed 2nd January, 2013 @ 20:59 by Terrie