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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:

Redox:

• 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

Electrolysis:

• 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

Stay Tuned!!!

Related Articles:

• O Level Chemistry – Strategies to Predict Products of Electrolysis for Aqueuous Solutions
• O Level Chemistry: Redox Reactions
• O Level Chemistry – Definition of Redox
• O Level Chemistry – More Questions on Redox
• O Level Chemistry – Strategies to Predict Products of Electrolysis for Aqueuous Solutions