For the next 1 week or so, i will be writing and discussing on the basic essentials concepts for Redox & Electrolysis.
Starting with this blog-post i will kick start a Series knows as “Secrets of Redox & Electrolysis“, where we will again discussed on some exam-based questions to see how much we have learned.
For local students taking GCE ‘O’ Level Examinations, these is what you need to know academically:
- Pure Chemistry Students – Redox Chapter & Electrolysis Chapters
- Combine Science (Chemistry) Students – Redox Chapter only
Based on the SEAB syllabus requirement, you will need to know the following learning outcomes:
- Define Oxidation & Reduction (Redox) in terms of oxygen/hydrogen gain/loss
- Define Redox in terms of electron transfer & changes in oxidation state
- Identify Redox reactions in terms of oxygen/hydrogen gain/loss, electron gain/loss & changes in oxidation state
- Aqueous potassium iodide & acidified potassium dichromate(VI) in testing for Oxidising & Reducing agents
- Define Electrolysis
- Apply the idea of Selective Discharge based on
(i) Cations: linked to the metal reactivity series
(ii) Anions: halides, hydroxides & sulphates
(iii) Concentration effects (electrolysis of conc. & dilute aqueous NaCl)
- Predict the likely products of the electrolysis of a molten binary compound such as NaCl
- Predict the likely products of the electrolysis of an aqueous electrolyte (dilute?& conc. solutions)
- Predict the likely products of the electrolysis of water
- Construct ionic equations for the reactions occurring at the electrodes during the electrolysis
- Electrolysis of aqueous copper(II) sulphate with copper electrodes as a means of purifying copper
- Electroplating of metals, e.g. copper plating, and its uses
- Simple Cells & the production of electrical energy
And these are two chapters that have about 20 marks in your GCE ‘O’ Level Chemistry Examinations – which also means you need to know them! No way for you to skip them!
Coming soon in next blog-posts…………..Definition of Reduction, Oxidation, Redox Reactions & Exam-based questions