Course: Introduction to oxidation-reduction and qualitative analysis. (NCEA L2 Chemistry)
An oxidation-reduction (redox) reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron. Qualitative analysis is the identification of ions present in a substance.
When:
Term 1
Subject Area(s)
Chemistry
NCEA L2
The aim of the course is to display knowledge of the appearance of redox reactants and their products and identify whether a half reaction is oxidation or reduction by discussing transfer of electrons or oxidation numbers. In qualitative analysis the participant will collect primary data using an identification procedure (flow chart), identify the chemical species present and describe the significance of an identified chemical species for people and/or the environment.
Requirements
Ideally the participant should have access to a laboratory and chemicals to enable them to undertake and observe some redox reactions but this is not essential.
Assessment
This is an internally assessed , Level 2 NCEA achievement standard 91167 worth 3 credits. The assessment is a closed book task, with a resource sheet of reagent formulae and colours, provided. The qualitative assessment is a practical, which requires the use of a laboratory and chemicals. It is internally assessed, Level 2 NCEA, achievement standard 91911 worth 3 credits.
About the Teacher
Maree Pullar has been teaching for thirty years, with the last eight years teaching online. She is registered as a teacher with Roxburgh Area School, where she teaches Science, Mathematics and Chemistry. Her major at the University of Otago was Chemistry. Mrs Pullar enjoys the outdoors; gardening, jogging, cycling, swimming and harriers. She follows the Highlanders and All Black rugby teams.