by john west | Oct 15, 2013 | school posts, Year 12, K-13
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
by john west | Apr 3, 2013 | school posts, Year 12, K-13
Click on the link to look at the questions you need to prepare for tomorrow
Chem 2.4 Questions 12
Click here for some information about electronegativity
Click here for the essential points when discussing polar and non polar molecules
by john west | Mar 24, 2013 | school posts, Year 12, K-13
Look through the presentation on diamond and graphite before tackling the question based on one in the 2011 paper.
This question is based on the 2011 paper.
by john west | Mar 18, 2013 | school posts, Year 12, K-13
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.
by john west | Mar 12, 2013 | school posts, Year 12, K-13
Watch the presentation carefully including the video then attempt the questions below. There will be a tutorial this Friday morning between 7.30 and 8.30 if you want more help.
by john west | Mar 5, 2013 | school posts, Year 12, K-13
Try these questions to predict whether a molecule is polar or non polar.