- Chemical Analysis Part 1
- Pure Substance is a substance that only contains one compound or element throughout
- Test the purity of a sample by measuring its melting or boiling point and comparing it with the melting or boiling point of the pure substance (found in data books)
- Impurities in a sample will lower the melting point and increase the melting range of your substance
- Impurities in a sample will increase the boiling point of your substance
- Useful mixtures with a precise purpose that are made by following a formula such as paint and cleaning products.
- Testing for Gases
- Bleaches damp litmus paper white
- May turn blue litmus paper red at first since a solution of chlorine is acidic
- Put a glowing splint inside a testube contains oxygen, the oxygen will relight the glowing splint
- Carbon Dioxide
- Bubbling Carbon Dioxide through an aqueous solution of calcium hydroxide (limewater) causes the solution to turn cloudy
- Hold a burning splint at the open end of a testube containing hydrogen and you will hear a ‘squeaky pop’.
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