Oxygen and Oxides 3.5 / 5 based on 4 ratings ? ChemistryAtoms and compoundsIGCSEEdexcel Created by: EllieCreated on: 29-11-12 14:31 What's the percentage of Nitrogen in the air? 78.1% 1 of 18 What's the percentage of Oxygen in the air? 21.0% 2 of 18 What's the percentage of Argon in the air? 0.9% 3 of 18 What's the percentage of Carbon Dioxide in the air? 0.04% 4 of 18 When heating copper, which two changes occur? Colour and Mass 5 of 18 Metal + Oxide --> Metal Oxide 6 of 18 Non-Metal + Oxygen --> Non-Metal dioxide 7 of 18 What happens if a metal oxide dissolves? It will form an alkaline solution. 8 of 18 What happens when a non-metal oxides dissolves? It will form an acidic solution. 9 of 18 Which two non-metals form an acidic solution? Hydrogen Oxide and Carbon Monoxide 10 of 18 Why is CO2 used to put out fires? It's denser than air and stops oxygen reaching flames. 11 of 18 Which two things form Acid rain? Sulphur dioxide and oxides of Nitrogen 12 of 18 Where does acid rain evolve from? Acid rain comes from volcanoes, powerstations, cars and fuels. 13 of 18 Water + Oxygen + Sulphur dioxide --> Sulphuric acid 14 of 18 Thermal decomposition= Metal carbonate + HEAT --> Metal oxide + Carbon dioxide 15 of 18 Tests for water prescence: Anyhydrous copper sulfate (white powder) --> Hydrated copper sulfate (blue crystals) 16 of 18 Tests for water prescence: Anhydrous cobalt chloride paper (blue paper) --> Hydrated cobalt chloride paper (pink paper) 17 of 18 Test for pure water= freezes at exactly 0 degrees and boils at exactly 100 degrees 18 of 18
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