6) Electrochemistry (2016)

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3 thoughts on “6) Electrochemistry (2016)

  1. Hello again,didn’t post any question here because i was very busy this whole month.

    My question is what kind of questions will be asked for this chapter in AS?Reason is as I look through the syllabus booklet for 2016,they wont ask anything about industrial processes like electrolysis of brine,extract Aluminium and etc unlike in previous past papers.

    And another thing i would like to ask is where can i get chemistry exercises besides past years?

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    • The syllabus states:
      6.1 Redox processes: electron transfer and changes in oxidation number (oxidation state)

      a) calculate oxidation numbers of elements in compounds and ions
      b) d escribe and explain redox processes in terms of electron transfer and changes in oxidation number
      c) u se changes in oxidation numbers to help balance chemical equations

      So I guess things like…
      “Define the term: “reducing agent” and give an example of a reduction reaction, labelling all species fully.”
      or stuff like calculate the ‘oxidation state’ of P in P4 (white phosphorous) or Os in (OsO4)- or Cl on (ClO2)- or O in H2O2.
      Also, stuff like “give the oxidation and reduction half equations for the following redox equilibrium: 2NaOH + HOCl + HCl NaCl + NaOCl + 2H2O”
      What process is represented by the (Cr2O7)2- + 14H+ = 2Cr3+ + 7H2O + 6e-
      That’s my guess. I couldn’t find any wuations relating to any of it when I was reading the “new” CIE blue book.

      For resources try goggling The Paddington academy (it’s in London) or “Frankly Chemistry” or “Doc Brown”. You could also try other boards like AQA. There is a fair deal of info similarity with AQA and CIE. Actuall just Google for key terms like AS Chemistry 9701 CIE practice questions. Actually I recommend you buy the new revision book by David Beven due out later this month.

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  2. Seniors 2015-2016 mat recall I gave you notes on fuel cells and batteries, but didn’t take time in class to discuss it. This video will assist your understanding:

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