7) OXIDATION AND REDUCTION Flashcards

1
Q

What makes an alcohol a primary alcohol

A

OH on the first (or end) carbon - only attached to one other carbon

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2
Q

What makes an alcohol a secondary alcohol

A

OH on internal carbons - attached to two other carbons

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3
Q

What makes an alcohol a tertiary alcohol

A

OH on internal carbon across from a branch - attached to three other carbons

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4
Q

What do primary alcohols oxidise to

A

Primary –> aldehydes —> carboxylic acid

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5
Q

What do secondary alcohols oxidise to

A

Secondary —> ketones

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6
Q

What do tertiary alcohols oxidise to

A

They do under go mild oxidation BUT

they can complete combustions when burned

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7
Q

What is oxidation

A
  • increase in O:H ratio (less hydrogens or more oxygens)

* loss electrons

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8
Q

Why would oxidising agents be used

A

To distinguish between aldehydes and ketones as aldehydes can undergo mild oxidation and ketones can’t

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9
Q

Name the types of oxidising agents and the colour change that occurs between each one

A

•Tollents reagent
(Colourless –> silver)

•acidified potassium dichromate
(Orange –> green)

•Benedictus solution
(Blue –> orange/red)

•copper oxide
(Black –> copper coloured)

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10
Q

What functional group do ketones and aldehydes have

A

Carbonyl

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11
Q

Where is the functional group on a aldehyde

A

End carbon

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12
Q

Where is the functional group on a ketone

A

Internal carbons

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13
Q

What should you always remember when naming a ketone

A

Put but the number where the functional group is

E.g
Propan-3-one

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14
Q

What ketones do you not need to show where the functional group is in the name

A

Propanone

Butanone

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15
Q

Why are antioxidant used

A

They are added to fat containing food in order to slow down the development of rancid it’s by oxidant in place of the food/oil

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16
Q

Ion electron equation got ascorbic acid

A

C6H8O6 –> C6H6O6 + 2H+ + 2e-

17
Q

What makes an alcohol a primary alcohol

A

OH on the first (or end) carbon

18
Q

What makes an alcohol a secondary alcohol

A

OH on internal carbons

19
Q

What makes an alcohol a tertiary alcohol

A

OH on internal carbon across from a branch

20
Q

What do primary alcohols oxidise to

A

Primary –> aldehydes —> carboxylic acid

21
Q

What do secondary alcohols oxidise to

A

Secondary —> ketones

22
Q

What do tertiary alcohols oxidise to

A

They do under go mild oxidation BUT

they can complete combustions when burned

23
Q

What is oxidation

A
  • increase in O:H ratio (less hydrogens or more oxygens)

* loss electrons

24
Q

Why would oxidising agents be used

A

To distinguish between aldehydes and ketones as aldehydes can undergo mild oxidation and ketones can’t

25
Name the types of oxidising agents and the colour change that occurs between each one
•Tollents reagent (Colourless --> silver) •acidified potassium dichromate (Orange --> green) •Benedictus solution (Blue --> orange/red) •copper oxide (Black --> copper coloured)
26
What functional group do ketones and aldehydes have
Carbonyl
27
Where is the functional group on a aldehyde
End carbon
28
Where is the functional group on a ketone
Internal carbons
29
What should oh always remember when naming a ketone
Put but the number where the functional group is E.g Propan-3-one
30
What ketones do you not need to show where the functional group is in the name
Propanone | Butanone
31
Why are antioxidant used
They are added to fat containing food in order to slow down the development of rancid it's by oxidant in place of the food/oil
32
Ion electron equation got ascorbic acid
C6H8O6 --> C6H6O6 + 2H+ + 2e-