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Copy - GCSE Chemistry 11L1 > 3.6 Alcohols, carboxylic acids and esters > Flashcards

3.6 Alcohols, carboxylic acids and esters Flashcards

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1
Q

How are carboxylic acids formed?

A

By the oxidisation of alcohols

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2
Q

What are the two ways that alcohols can be oxidised?

A
  1. Through microbial action

2. Reacting with a chemical oxidising agent

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3
Q

What is an example of a chemical oxidising agent?

A

Potassium Dichromate

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4
Q

What acid is the main part of vinegar?

A

Ethanoic acid

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5
Q

What sort of pH do carboxylic acids have and why?

A

High pH values for acids. This is because the only partially ionise.

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6
Q

What substance is formed by the oxidisation of ethanol?

A

Ethanoic acid

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7
Q

Why does the fermentation of beer and wine have to take place in the absence of air?

A

The oxygen in air would react with the acids to cause a carboxylic acid to form.

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8
Q

What is the formula of methanoic acid?

A

HCOOH

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9
Q

What is the formula of ethanoic acid?

A

CH3COOH

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10
Q

What is the formula of propanoic acid?

A

C2H5COOH

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11
Q

What does ethanoic acid smell of?

A

Vinegar

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12
Q

What colour does universal indicator paper go when dipped in ethanoic acid?

A

Orange

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13
Q

What is a carboxylic acid?

A

A weak acid that only partially ionises in a solution

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14
Q

What pH do alcohols have when dissolved in water and why?

A

A neutral pH, because they can’t gain or lose hydroxide (OH) ions

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15
Q

What happens when you add sodium to alcohols?

A

Effervescence as hydrogen is being given off. This can be tested with the squeaky pop.

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16
Q

What solvents are alcohols used for?

A

Medicines, perfume and cosmetics

17
Q

Why are alcohols good solvents in perfume?

A

Because they evaporate quickly from the skin

18
Q

Do alcohols burn well in air?

A

Yes they burn well in air in a combustion reaction

19
Q

What is the reaction when alcohols combust?

A

Alcohol + oxygen —-> carbon dioxide + water

20
Q

Are alcohols dangerous?

A

Ethanol is toxic in large amounts but others are even more dangerous; they can cause death in small amounts

21
Q

What are the advantages of using alcohols as fuels?

A

They’re renewable and carbon neutral

22
Q

What are two examples of alcoholic fuels?

A

Methylated spirit is used in camping stoves

Ethanol is used as car fuel

23
Q

What is the general formula for alcohols?

A

CnH2n+1OH

24
Q

What is the functional group for alcohols?

A

-OH

25
Q

What series do the different alcohols form together?

A

A homologous series

26
Q

Name the first three alcohols in order of increasing number of carbon atoms

A

Methanol
Ethanol
Propanol

27
Q

What do the names of all alcohols end with?

A

-ok

28
Q

What kind of compounds are alcohols?

A

Organic compounds

29
Q

Which alcohol does alcoholic drinks contain?

A

Ethanol

30
Q

What is the formula for methanol?

A

CH3OH

31
Q

What is the formula for ethanol?

A

C2H5OH

32
Q

What is the formula for propanol?

A

C3H7OH

33
Q

What colour are the simplest alcohol liquids?

A

Colourless

34
Q

What are alcohols good solvents?

A

Because they dissolve some substances that water doesn’t

35
Q

What colour flames do alcohols burn with?

A

Pale blue flames

Copy - GCSE Chemistry 11L1 (23 decks)

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