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Chemistry GCSE > 4.7.2 Reactions of alkenes and alcohols (might come up) > Flashcards

4.7.2 Reactions of alkenes and alcohols (might come up) Flashcards

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1
Q

Describe the combustion of alkenes

A

They burn with smoky flames due to incomplete combustion

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2
Q

Describe addition reactions of alkenes

A

Addition atoms across the carbon - carbon double bond so that the double bond becomes a single carbon - carbon bond
With hydrogen requires a higher temp and a nickel catalyst
With stream requires a high temp, pressure and concentrated phosphoric acid as a catalyst
With addition of halogens

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3
Q

What is an alcohol

A

An organic compound that contains an -OH functional group

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4
Q

State characteristics of methanol, ethanol, propanol and butanon

A

Dissolve in water to form a neutral solution
React with sodium to form hydrogen
Burn in oxygen
React with carboxylic acids in presence of acid catalyst to form esters

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5
Q

Oxidation of the alcohols leads to ?

A

Carboxylic acids

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6
Q

What are some uses of alcohols

A

Fuels
Solvents
Drinks

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7
Q

Conditions required for fermentation of glucose and state the equation of reaction

A

30 degrees C, aqueous solution of the glucose, absence of air, yeast added

C6H12O6 –> 2CH3CH2OH + 2CO2

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8
Q

What are carboxylic acids

A

Organic compounds that contain a COOH functional group

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9
Q

State characteristics of carboxylic acids

A

Dissolve in water to form an acidic solution
React with metal carbonates to form carbon dioxide
React with alcohols with an acid catalyst to produce esters
React with metals to give off hydrogen gas

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10
Q

What type of acid is carboxylic acid

A

A weak acid

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11
Q

Why are carboxylic acids weak acids

A

They are partially ionised in water, the pH of the acid in a solution is not as low as a solution of a strong acid of the same conc

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12
Q

Names of carboxylic acids

A

Methanoic acid
Ethanoic acid
Propanoic acid
Butanoic acid

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13
Q

What is an ester and how is it formed

A

An organic compound containing a -COO- functional group
Formed from carboxylic acid and alcohol in the presence of a sulfuric acid catalyst
Fruity smell

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Chemistry GCSE (28 decks)

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