Transition metal colours

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1. State the colour of Fe2+ at the start and end of a precipitation reaction

  • Pale green --> green
  • Yellow --> green
  • Pale green --> green with a rusty brown surface
  • Pale blue --> pink
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2. What is a precipitation reaction

  • When two reactants react together to produce chemicals
  • When two aqueous solutions are mixed together to form a solid suspension (precipitate) in the solution
  • When two solutions are mixed together and they form a coloured solution
  • When two solid react together to produce chemicals

3. State the colour of Fe3+ at the start and end of a precipitation reaction

  • Blue --> Green
  • Yellow ---> orange
  • Pale yellow --> rusty brown
  • Pale yellow --> blue

4. State the colour of Co2+ at the start and end of a precipitation reaction

  • Blue --> beige
  • Pink --> green
  • Pink --> blue
  • Yellow --> maroon

5. State the colour of Cu2+ at the start and end of a precipitation reaction

  • Pale blue solution --> pale blue
  • Pink --> pink
  • Orange --> blue
  • Pink --> yellow

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