Predicting Binary Product Compounds
Specification Point 3.26:
Predict the products of electrolysis of other binary, ionic compounds in the molten state.
- These products are much easier to predict since there are only one type of anion and cation present, hence there are no H+ or OH– ions competing at the electrodes.
- To predict the products of any binary molten compound first identify the ions present.
- The positive ion will migrate towards the cathode and the negative ion will migrate towards the anode.
- Therefore the cathode product will always be the metal and the product formed at the anode will always be the non-metal.
Diagram showing the electrolysis of molten PbBr2
Edexcel GCSE Chemistry Notes
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Morgan’s passion for the Periodic Table begun on his 10th birthday when he received his first Chemistry set. After studying the subject at university he went on to become a fully fledged Chemistry teacher, and now works in an international school in Madrid! In his spare time he helps create our fantastic resources to help you ace your exams.
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