Old KS4 Science Curriculum - Science
Mission Objectives
Describe how to use chemical tests to identify the ions in unknown compounds
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Words and meanings to learn
charge
The amount of energy something has.
compound
Two or more different elements which are held together by ionic or covalent bonds.
precipitate
To convert a chemical substance into a solid using a solution by turning the substance into a super-saturated mixture or an insoluble structure.
solution
Mixture which is liquid and is equally spread out within the main component.
ions
A molecule or atom which will gain or lose one or more electrons leading to a net electric charge.
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Resources: Bunsen burner, test tubes and test tube rack, teat pipette, nichrome wire mounted in handle or cork, limewater, 0.4 mol/dm3 dilute hydrochloric acid, 0.1 mol/dm3 barium chloride solution, 0.4 mol/dm3 dilute nitric acid, 0.05 mol/dm3 silver nitrate solution, chlorides of lithium, sodium, potassium, calcium and copper, sodium salts containing carbonate, sulfate, chloride, bromide and iodide, salt solution labelled ‘unknown’.
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