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Carbonyl Compounds > Redox Reactions > Flashcards

Redox Reactions Flashcards

1
Q

Reduction reaction
Conditions
Equations

A

LiAlH4 used in dry ether
RCHO + [H] —> ROH
RCOR + [H] —> ROHR
Ketones cannot be oxidised but aldehydes can

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2
Q

List the reagents that can oxidise aldehydes to carboxylic acids

A

Acidified potassium dichromate
Fehling’s solution
Benedict’s solution
Tollen’s reagent

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3
Q

Oxidation reaction equation of aldehydes

A

RCHO + [O] —> RCOOH

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4
Q

Acidified potassium dichromate
Colour change
Why

A

Orange solution —> green solution
Colour change is due to chromium +6 changing to +3

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5
Q

Fehling’s solution
Colour change

A

Deep blue solution —> red ppt

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6
Q

Benedict’s solution
Colour change
Why for Benedicts and Fehling’s

A

Deep blue solution —> red ppt
Conversion of copper (II) complex to copper (I) oxide

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7
Q

Tollen’s reagent
Colour change
Why

A

Colourless solution —> silver mirror
Conversion of silver (I) complex to metallic silver

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Carbonyl Compounds (5 decks)

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