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week 5, term 2

  • We have some pages to be finished in your green lab book:
  1. electron transfer p85
  2. oxidation-reduction half equations p86/87
  3. redox summary p93
  4. oxidation numbers p99/100
  • complete Act 27B in the study guide
  • read 'writing redox equations' p245-248
  • complete Act 27C in study guide. For Q1 ,add water molecules to balance the oxygens, add hydrogen ions to the opposite of the equation to balance hydrogens, then balance charge by adding electrons to the more positive side of the equation.  For Q2 you will have to separate the equation into 2 half equations firstly, then proceed using the steps you did in Q1 for both half equations. Lastly add the 2 half equations together. make sure that your half equations have the same number of electrons on sides of the equation. If they don't have the same number of electrons you will have to multiply the whole equation by a factor (sometimes this may require you to multiply each equation by different factors e.g. if one equation has 2 electrons and the other has 5 electrons, you will have to muliply the 1st equation by 5 and the 2nd equation by 2).
  • complete Act 7C (in attachments)
  • read p249/250 in study guide. Copy the table of oxidants and the table of reductants into your notes. You will need to remember the colour changes and the name of the species formed.eg. potassium permanganate MnO4- is purple solution and it turns into Mn 2+ ions which are colourless (there are templates in the attachments if you wish to print them off).
  • complete Act 27D in study guide.
  • complete Act 7D (attachments)
  • the AB sheet is good if you can work in a pair (sorry Tonicha and Kristian, you could get a friend to do it with, or just do it yourself). One person has the A sheet and the other completes the B sheet. Then compare sheets to see which equations you got correct.
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Maree Pullar,
19 May 2012, 19:29
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Act 7C.pdf
(100k)
Maree Pullar,
19 May 2012, 19:29
Ċ
Act 7D.pdf
(119k)
Maree Pullar,
19 May 2012, 19:30
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Maree Pullar,
23 May 2012, 16:03
ĉ
Maree Pullar,
19 May 2012, 19:34
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Maree Pullar,
23 May 2012, 16:04
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