Igcse edexcel chemistry - Study guides, Class notes & Summaries

EDEXCEL IGCSE Chemistry Questions And Answers The acid used for sulfate ion test - ANSWER hydrochloric acid The solution used for sulfate ion test (there can be 2) - ANSWER barium chloride The colour of barium sulfate precipitate - ANSWER white The acid used for carbonate ion test (dilute) - ANSWER nitric acid Indication of a carbonate ion - ANSWER bubbles Hydroxide precipitation tests (excess) Potassium (K+) - ANSWER none ...

▪ Potassium manganate (VII) and water (purple colour spreads), ammonia and hydrogen chloride (white ring forms closer to hydrogen chloride), bromine gas and air (brown bromine gas diffuses) - Ans .3 experiments to show diffusion ▪ 4OH- = O2 + 2H2O + 4E- - Ans .Half equation for hydroxide ions ▪ Moves slowly (on the surface), fizzes, eventually disappears - Ans .Lithium with water - observations ▪ Moves quickly (on the surface), fizzes rapidly, may ignite - Ans .Sodium with water ...

iGCSE Chemistry Pearson Edexcel Topic 2 Inorganic Chemistry Complete Notes

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What causes electricity flow in carbon and metals? - correct answer The low of electricity in metals and carbon is due to movement of delocalised (mobile) electrons, there is no chemical change involved. What is meant by electrolysis? - correct answer Electrolysis takes place when an electric current is passed through a molten ionic compound, or through an aqueous solution of an ionic compound. What is meant by electrolyte? - correct answer An electrolyte is a substance that undergoes elec...

iGCSE Chemistry Pearson Edexcel Topic 3 Physical Chemistry Complete Notes

▪ High - Ans .Giant ionic structures melting point/ boiling point ▪ Closely packed lattice arranged by the attraction between oppositely charged ions - Ans .Giant ionic structures structure ▪ The electrostatic attraction between oppositely charged ions is very strong so requires a lot of energy to overcome - Ans .Why do giant ionic structures have high mps/bps? ▪ The stronger the forces of attraction - Ans .The higher the charges of the ions in a giant ionic structure ... ▪ 4 ...