Transition metals + ammonia & NaOH - Edexcel chemistry a2

Hello guys, this is a quiz about PERCIPITATE COLOURS for reactions of transition metals with OH- and NH3, as well as in water. It is specifically suited to the Edexcel A2 unit 5 specification (chemsitry) but can be used for any. :)

N.B. the colours vary according to what textbook you use, I've used the ones in the official Edexcel textbook rather than the revision guide. 

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  • Created by: Mirte
  • Created on: 07-06-14 11:24

1. The order of Chronium observations in reactions with 1)water 2)OH- and NH3 3)Excess OH- 4)Excess NH3 is.....

  • 1violet solution 2violet ppt 3no change 4no change
  • 1violet solution 2violet ppt 3green ppt 4yellow solution
  • 1violet solution 2violet ppt 3green solution 4yellow solution
  • 1pink solution 2blue ppt 3green solution 4yellow solution
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Other questions in this quiz

2. What colour is the Nickel (II) ion in water?

  • Green solution
  • Blue solution
  • Yellow solution
  • Green precipitate

3. What colour is the Cr3+ ion in water?

  • Violet solution
  • Blue precipitate
  • Violet precipitate
  • Blue solution

4. Only Zinc and Chronium react to produce a different colour with excess OH- added.

  • True
  • False

5. What is the colour and formula of the Mn2+ ion in water?

  • Blue, [Mn(H2O)6]3+
  • Pink, [Mn(H2O)6]2+
  • Violet, [Mn(H2O)2(OH)4]2-
  • Green, [Mn(H2O)6]2+

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