REDOX REACTIONS
Title:
Demonstrate understanding of oxidation-reduction
Credits: 3
Assessment: Internal
Date version published: 17 November 2011
This achievement standard involves demonstrating understanding of oxidation-reduction.
Achievement Criteria
Achievement
· Demonstrate understanding of oxidation-reduction.
Achievement with Merit
· Demonstrate in-depth understanding of oxidation-reduction.
Achievement with Excellence
· Demonstrate comprehensive understanding of oxidation-reduction.
Explanatory Notes
1 This achievement standard is derived from The New Zealand Curriculum, Learning Media, Ministry of Education, 2007, Level 7. The standard is aligned to the Nature of Science achievement objectives and the Material World achievement objectives, and is related to the material in the Teaching and Learning Guide for Chemistry, Ministry of Education, 2010 at http://seniorsecondary.tki.org.nz.
2 Procedures outlined in Safety and Science: a Guidance Manual for New Zealand Schools, Learning Media, Ministry of Education, 2000 should be followed.
3 Demonstrate understanding involves describing, identifying, naming, giving an account of oxidation-reduction and describing oxidation-reduction reactions. This requires the use of chemistry vocabulary, symbols and conventions.
Demonstrate in-depth understanding involves making and explaining links between oxidation-reduction reactions, observations and equations. This requires explanations that use chemistry vocabulary, symbols and conventions.
Demonstrate comprehensive understanding involves justifying, evaluating, comparing and contrasting, or analysing links between oxidation-reduction reactions, observations and equations. This requires the consistent use of chemistry vocabulary, symbols and conventions.
4 Oxidation-reduction is limited to:
· oxidation numbers
· electron transfer in reactions
· oxidants and/or reductants
· observations for reactions
· balanced oxidation-reduction half equations
· overall balanced oxidation-reduction equations.
5 Knowledge of the appearance of redox reactants and their products includes a selection from, but is not limited to:
· oxidants include a selection from, but not limited to: O2, I2, Br2, Cl2, OCl- H+,Fe3+, Cu2+, H2O2, MnO4–/H+, Cr2O72–/H+, concentrated HNO3, IO3-
· reductants include a selection from, but not limited to, metals, C, H2, Fe2+, Br–, I–, H2S, SO2 ,SO32–, HSO3–, H2O2
6 Conditions of Assessment related to this achievement standard can be found at www.tki.org.nz/e/community/ncea/conditions-assessment.php.
Demonstrate understanding of oxidation-reduction
Credits: 3
Assessment: Internal
Date version published: 17 November 2011
This achievement standard involves demonstrating understanding of oxidation-reduction.
Achievement Criteria
Achievement
· Demonstrate understanding of oxidation-reduction.
Achievement with Merit
· Demonstrate in-depth understanding of oxidation-reduction.
Achievement with Excellence
· Demonstrate comprehensive understanding of oxidation-reduction.
Explanatory Notes
1 This achievement standard is derived from The New Zealand Curriculum, Learning Media, Ministry of Education, 2007, Level 7. The standard is aligned to the Nature of Science achievement objectives and the Material World achievement objectives, and is related to the material in the Teaching and Learning Guide for Chemistry, Ministry of Education, 2010 at http://seniorsecondary.tki.org.nz.
2 Procedures outlined in Safety and Science: a Guidance Manual for New Zealand Schools, Learning Media, Ministry of Education, 2000 should be followed.
3 Demonstrate understanding involves describing, identifying, naming, giving an account of oxidation-reduction and describing oxidation-reduction reactions. This requires the use of chemistry vocabulary, symbols and conventions.
Demonstrate in-depth understanding involves making and explaining links between oxidation-reduction reactions, observations and equations. This requires explanations that use chemistry vocabulary, symbols and conventions.
Demonstrate comprehensive understanding involves justifying, evaluating, comparing and contrasting, or analysing links between oxidation-reduction reactions, observations and equations. This requires the consistent use of chemistry vocabulary, symbols and conventions.
4 Oxidation-reduction is limited to:
· oxidation numbers
· electron transfer in reactions
· oxidants and/or reductants
· observations for reactions
· balanced oxidation-reduction half equations
· overall balanced oxidation-reduction equations.
5 Knowledge of the appearance of redox reactants and their products includes a selection from, but is not limited to:
· oxidants include a selection from, but not limited to: O2, I2, Br2, Cl2, OCl- H+,Fe3+, Cu2+, H2O2, MnO4–/H+, Cr2O72–/H+, concentrated HNO3, IO3-
· reductants include a selection from, but not limited to, metals, C, H2, Fe2+, Br–, I–, H2S, SO2 ,SO32–, HSO3–, H2O2
6 Conditions of Assessment related to this achievement standard can be found at www.tki.org.nz/e/community/ncea/conditions-assessment.php.
