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Chemical Analysis, Chromotography - Coggle Diagram
Chemical Analysis
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Gas Tests
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Chlorine
Chlorine has a characteristic sharp, choking smell. It also makes damp blue litmus paper turn red, and then bleaches it white.
Carbon dioxide
Carbon dioxide turns limewater milky. A lighted wooden splint goes out in a test tube of carbon dioxide but this happens with other gases, too. So the limewater test is a better choice.
Pure and Impure
Impure substances are there is more than one type of atom,
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Chromotography
1.draw a pencil line across the chromatography paper, 1 - 2 cm from the bottom
- use a pipette or capillary tube to add small spots of each ink to the line on the paper
- place the paper into a container with a suitable solvent in the bottom
- allow the solvent to move through the paper, but remove the chromatogram before it reaches the top
- allow the chromatogram to dry, then measure the distance travelled by each spot and by the solvent