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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Colour change of reaction between ammonia and aqueous copper (II) ions (also what precipitate forms in between) |
Pale blue—> Dark blue (Pale blue precipitate, then dissolves in excess ammonia) |
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How many NH3s replace the water ligands |
4 |
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Colour change between chloride ions and aqueous copper (II) ions |
Pale blue—> yellow |
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What is the change in shape of this reaction |
Octahedral—> tetrahedral |
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What is the difference between chromium (III) potassium sulfate and chromium (III) sulfate |
KCr(SO4)2 •12(H2O) forms a pale purple solution when dissolved in water whereas a green solution is formed in the other one Chromium (III) forms [Cr(H2O)5SO4]+ whereas the other compounds forms [Cr(H2O)6]3+ |
Talk about colour when dissolved in water and the complex ions formed |
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What are the 2 distinct steps formed in the reaction of aqueous chromium (III) ions and ammonia |
1. Initially a grey-green precipitate of Cr(OH)3 is formed 2. Cr(OH)3 precipitate dissolves in excess ammonia to form the complex ion [Cr(NH3)6]3+ |
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Overall colour change of this reaction |
Violet—> purple |
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What 2 different compounds react with transition metal ions in a precipitation reaction |
Aqueous sodium hydroxide and ammonia |
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Which metal ions form a precipitate which is insoluble to excess sodium hydroxide |
Cu2+, Fe2+, Fe3+, Mn2+ |
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Colour change of precipitation reaction between Cu2+ and NaOH |
Blue solution—> blue precipitate |
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Colour change of reaction between Fe2+ and NaOH and what happens when product is exposed to air |
Pale green solution—> green precipitate Green precipitate turns to orange-brown because Fe2+ oxidised to Fe3+ |
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Colour change in reaction between Fe3+ and NaOH |
Pale yellow—> orange-brown precipitate |
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Colour change in reaction between Mn2+ and NaOH What happens when it is exposed to air |
Pale pink—> light brown Darkens when exposed |
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Which metal ion forms a precipitate which does dissolve in excess NaOH |
Cr3+ |
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What is the colour change of this reaction |
Violet solution—> green precipitate —> dark green solution |
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What are the 2 equations to this reaction |
Cr3+(aq) + 3OH-(aq) —> Cr(OH)3(s) Cr(OH)3(s) + 3OH- —> [Cr(OH)6]3- |
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Which transition metal ions react the same with ammonia and NaOH |
Fe2+, Fe3+, Mn2+ |
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Which two transition metal ions form a precipitate which can dissolve in excess ammonia |
Cr3+ and Cu2+ (this has been stated before) |
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Colour change of reaction between Cr2+ and ammonia |
Violet solution—> green precipitate—> purple solution |
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Colour change of reaction between Cu2+ and ammonia |
Blue solution—> blue precipitate—> deep blue solution |
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