Home > Subjects > Chemistry > Level 2 > 2.7 Oxidation–reduction > Achievement criteria
- Subject: Chemistry
- AS: AS90311
- Level: 2
- Credits: 3
- External
Chemistry 2.7 Describe oxidation–reduction reactions
Achievement criteria
The level of achievement that you will reach is decided by the way you answer each question. The key words are describe, apply, and discuss oxidation–reduction reactions.
Achievement
- Describe oxidation–reduction reactions.
- determine oxidation numbers of elements in simple examples
- balance simple half equations
- identify oxidants and reductants
- describe the appearance of common oxidants and reactants and products formed
- recall learned ideas, eg give a limited description of what happens in an electrolytic cell.
Make sure you can:
Achievement with Merit
- Apply oxidation–reduction principles.
- determine and explain oxidation numbers in more complex examples
- apply changes in oxidation numbers to redox reactions and explain the link
- understand when water is, or is not, required to balance half equations
- link observations of species to observations in reactions
- apply principles of electrolysis to various examples.
Make sure you can:
Achievement with Excellence
- Discuss oxidation–reduction processes.
- apply redox principles to write a full and clear explanation of how oxidation numbers combine in an unfamiliar example
- write full discussion answers when justifying colours and oxidation states of all species in a redox reaction
- discuss understanding of electrolytic cells and write about it in a logical sequence in a paragraph.
Make sure you can:
