WM Flashcards

1
Q

Primary alcohols oxidise to form…

A

Aldehydes

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2
Q

Secondary alcohols oxidise to form…

A

Ketones

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3
Q

Tertiary alcohols oxidise to form…

A

Nothing
Tertiary alcohols don’t oxidise easily

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4
Q

carboxylic acids contain the functional group…

A

-COOH

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5
Q

esters have the functional group…

A

-COO-

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6
Q

esters are formed from

A

alcohols and carboxylic acids

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7
Q

esters are named by…

A

the alcohols and the carboxylic acids they are made from
e.g. ethanol + ethanoic acid —> ethyl ethanoate + water

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8
Q

functional group of aldehydes…

A

-CHO

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9
Q

functional group of ketones…

A

-C=O

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10
Q

functional group of acid anhydrides…

A

-COOCO-

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11
Q

ether functional group..

A

-O-

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12
Q

alcohols functional group…

A

-OH

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13
Q

how many R groups do primary alcohols have

A

1

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14
Q

how many R groups do secondary alcohols have

A

2

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15
Q

how many R groups do tertiary alcohols have

A

3

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16
Q

what do phenols contain

A

benzene ring
alcohol group -OH

17
Q

what do phenols not react with

A

carbonates

18
Q

are phenols weak or strong acids

19
Q

how are phenols identified

A

using neutral iron(iii) chloride solution
if present it turns purple

20
Q

what forms between phenols and acids anhydrides

21
Q

what are the two methods of esterification

A

where carboxylic acids and alcohols react to form esters
acid anhydrides and phenols

22
Q

what conditions are required in esterification of carboxylic acids contain and alcohol

A

heated under reflux
strong acid catalyst usually concentrated sulfuric acid

23
Q

what are esters properties

A

sweet smelling
low boiling point
good solvents for polar molecules

24
Q

ester uses

A

perfumes
food flavourings

25
why are acid anhydrides more preferred in esterification
they don’t produce toxic HCl as a side product react less vigorously
26
how are primary alcohols oxidised to aldehydes and how is the aldehyde separated
they are heated in the presence of acidified potassium dichromate(VI) the aldehyde is separated by distillation
27
what happens when an aldehyde is distilled further under reflux
the aldehyde is oxidised into a carboxylic acid
28
what must be present to oxidise secondary alcohols to ketones
acidified potassium dichromate(VI)
29
what happens to the potassium dichromate (VI) as an alcohol is oxidised
the potassium dichromate (VI) is reduced
30
what is the reduction of potassium dichromate (VI) observed as
orange to green