What happens when acidified potassium dichromate (VI) is added to an aldehyde?
Colour change from orange to green
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What happens when acidified potassium dichromate (VI) is added to a ketone?
No colour change
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What happens when Tollens' reagent is added to an aldehyde?
Colourless solution with a grey precipitate of silver (silver mirror)
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What happens when Tollens' reagent is added to a ketone?
Nothing- colourless solution remains
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What happens when Benedict's solution is added to a ketone?
No change- blue colour remains
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What happens when Fehling's solution is added to an aldehyde?
Blue solution produces a dark red precipitate of copper(I) oxide
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What is produced when an aldehyde is oxidised?
Acidic conditions- carboxylic acid formed Alkaline conditions- salt of carboxylic acid formed (O- instead of OH)
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What is the trend for aldehyde/ ketone oxidation and why?
Aldehydes are very easy to oxidise as they have an exposed H atom. Only very strong, destructive oxidising agents can oxidise ketones as they have no H attached to the C=O
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Other cards in this set
Card 2
Front
What happens when acidified potassium dichromate (VI) is added to a ketone?
Back
No colour change
Card 3
Front
What happens when Tollens' reagent is added to an aldehyde?
Back
Card 4
Front
What happens when Tollens' reagent is added to a ketone?
Back
Card 5
Front
What happens when Benedict's solution is added to a ketone?
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