Topic 8 – Chemical analysis

Purity, formulations and chromatography

8.1.1 Pure substances In Chemistry, pure substance is... Single element or compound Not mixed with any other substance Eg vaporised iodine Pure elements and compounds Melt & boil at specific temp Melting & boiling point data → distinguish pure substances from...

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Identification of common gases

8.2.1 Test for hydrogen 8.2.2 Test for oxygen 8.2.3 Test for carbon dioxide 8.2.4 Test for chlorine Gases Test Positive Result Hydrogen (H2) Burning spit held at the open end of a test tube of gas Burns rapidly with a squeaky pop sound Oxygen (O2) Insert glowing...

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