Electrolysis of Aqueous Solutions EXPLAINED | Lecture 3 + MCQs | IGCSE/O Level Chemistry (0620/5070)

Lecture 3 is here - and this is where electrolysis gets TRICKY! Aqueous solutions have competing ions (from water AND the dissolved compound), so predicting products becomes more complex. But don't worry - we break down the rules step-by-step and work through past paper questions so you know exactly what examiners expect.

🔥 What you'll learn:
• Why aqueous solutions are different from molten compounds
• The reactivity series and discharge rules at the cathode
• Predicting which ions get discharged at the anode (halides vs other anions)
• How water affects product prediction (H⁺ and OH⁻ ions compete!)
• Step-by-step method for ANY aqueous electrolysis question
• Past paper question walkthroughs (see how it's actually tested in exams)

This is one of the most exam-heavy topics in electrochemistry - master this and you're set for A/A* questions.

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Structured lectures, past paper practice, and guided revision for students serious about getting top grades.

⏱️ Timestamps:
0:00 - Aqueous vs Molten: Why It's Trickier
2:34 - Reactivity Series for Product Prediction
7:53 - Golden Rule: Nitrate & Sulfate Ions
9:09 - Dilute vs Concentrated Solutions
13:10 - Example: Aqueous Copper Sulfate Electrolysis
28:14 - Example: Concentrated Aqueous Sodium Chloride
34:06 - Example: Dilute Sulfuric Acid
38:17 - Past Paper MCQ Walkthroughs

Next up: Lecture 4 - Electroplating & Industrial Applications of Electrolysis
Drop a comment if the past paper questions helped! What electrochemistry topic do you find trickiest?

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