Edexcel IGCSE Chemistry - Paper 1 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) 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) - Correct Answers ✅3 experiments to show diffusion 4OH- = O2 + 2H2O + 4E- - Correct Answers ✅Half equation for hydroxide ions Moves slowly (on the surface), fizzes, eventually disappears - Correct Answers ✅Lithium with water - observations Moves quickly (on the surface), fizzes rapidly, may ignite - Correct Answers ✅Sodium with water - observations Reacts vigorously, burns with a lilac flame, sometimes explodes - Correct Answers ✅Potassium with water - observations Heat copper (in a tube and pass air over it) - Correct Answers ✅Experiment to test the proportion of oxygen in air Pale blue - Correct Answers ✅Sulfur flame colour 1 / 2
Edexcel IGCSE Chemistry - Paper 1 EXAM
QUESTIONS AND ANSWERS 100%
SOLVED (Newest 2025) Orange/yellow - Correct Answers ✅Carbon flame colour Downward delivery (it is denser than air) - Correct Answers ✅How to collect chlorine 2H2O + CaCO3 = CaCl2 + H2O + CO2 - Correct Answers ✅How to make CO2 in a lab (equation) It is soluble in water - Correct Answers ✅Why can CO2 be used in fizzy drinks?Platinum wire, dip in hydrochloric acid, hold in flame - Correct Answers ✅Flame test wire to use + how to sterilise it So the gas can dissolve and make the colour change - Correct Answers ✅Why does litmus paper need to be damp when testing a gas?Hydrochloric acid - Correct Answers ✅Acid added to remove any impurities for the sulphate test Nitric acid - Correct Answers ✅Acid added to remove any impurities for the halide test
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