Quick revision3    draw diagrams ppt
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  • 1. QUICK REVISION• DRAW DIAGRAMS
  • 2. Heat of displacement of metalsReactionequation Mg + CuCl2  MgCl2 + CuObservationsDiagramMagnesium and copper(II)chloride solutionMagnesium dissolvesBlue solution decolourise
  • 3. Preparation of insoluble saltAimequation AgNO3 + NaCl  AgCl + NaNO3ObservationsDiagramTo prepare silver chloride saltWhite precipitate formed
  • 4. Preparation of soluble salt usingacid and oxide metalAimequation CuO + H2SO4  CuSO4 + H2OObservationsDiagramTo prepare copper(II) sulphateCopper(II) oxide dissolveBlue solution formed50 cm3sulphuric acid0.5 mol dm-3Excess copper(II)oxide powder
  • 5. Heating of carbonate metalReactionequation ZnCO3  ZnO + CO2ObservationsDiagramHeating zinc carbonateResidue is yellow(hot) andwhite (cold)Gas changed lime water chalky
  • 6. To determine reactivity of metals withoxygenReactionequation 2Zn + O2  2ZnOObservationsDiagramZinc with oxygenZinc burns to leave whitepowderPotassiummanganate(VII)Glass woolMetalpowderHeat (1)Heat (2)
  • 7. Ethanol  etheneCatalystequation C2H5OH  C2H4 + H2OGasethenewaterGlasswoolSoaked inethanolPorcelain chipsHeatObservationsDiagramHot porcelain chipsGas collected decolourisebrown bromine water