Alcohol

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

Conditions for the hydration of ethene by steam

Back (Answer)

300 degrees 60 atm Phosphoric Acid Catalyst

Front (Question)

What is a renewable source for when ethene runs out?

Back (Answer)

Ethanol

Front (Question)

What is the chemical equation for ethanol from fermentation?

Back (Answer)

C6H12O6 –> 2C2H5OH + 2CO2

Front (Question)

Is fermentation endothermic or exothermic?

Back (Answer)

Exothermic

Front (Question)

What enzyme does fermentation of glucose require? What is the temperature optimum?

Back (Answer)

30-40 degrees Yeast

Front (Question)

Does fermentation use anaerobic or aerobic conditions?

Back (Answer)

Anaerobic

Front (Question)

After forming, what happens to ethanol before use as a biofuel? Why?

Back (Answer)

Fractional distillation To rid of the rest of impurities

Front (Question)

How can alcohols be produced other then fermentation?

Back (Answer)

By hydration of an alkene with an acid catalyst.

Front (Question)

Does hydration or fermentation have a higher percentage yield?

Back (Answer)

Hydration - produced only ethanol. Fermentation - produces CO2 as well

#10

Front (Question)

Is hydration or fermentation cheaper?

Back (Answer)

Fermentation Required a lower temperature so cheaper tools

#11

Front (Question)

Is hydration or fermentation slower?

Back (Answer)

Fermentation Has to be made in batches whilst hydration can done industrially

#12

Front (Question)

Is hydration or fermentation more renewable?

Back (Answer)

Fermentation Uses renewable sources

#13

Front (Question)

Is hydration or fermentation faster?

Back (Answer)

Hydration Fermentations requires fractional distillation afterwards

#14

Front (Question)

What is a biofuel?

Back (Answer)

A fuel made from from recently deceased biological molecules

#15

Front (Question)

Why is biofuel good?

Back (Answer)

Renewable & Sustainable Classified as carbon neutral

#16

Front (Question)

Why is biofuel bad?

Back (Answer)

Petrol cars have to be modified to accommodate Takes up land for growing crops for ethanol instead

#17

Front (Question)

What are the equations showing biofuel as net zero?

Back (Answer)

Plants take in CO2: 6CO2 + 6H20 -> C6H12O6 + 6O2 Fermentation, glucose into ethanol: C6H12O6 -> 2C2H5OH + 2CO2 Ethanol burnt and CO2 produced again: 2C2H5OH + 6O2 -> 4CO2 + 6H2O

#18

Front (Question)

Why is the net zero classification not entirely accurate?

Back (Answer)

Make fertilisers for the crops Harvest the crops Refine the crops Transport the crops

#19

Front (Question)

What oxidant agent is used for alcohol? Chemical formula?

Back (Answer)

Potassium dichromate K2Cr2O7

#20

Front (Question)

Oxidation of a primary alcohol

Back (Answer)

Aldehyde -> Carboxylic acid

#21

Front (Question)

Oxidation of a secondary alcohol

Back (Answer)

ketone

#22

Front (Question)

Oxidation of a tertiary alcohol

Back (Answer)

No reaction

#23

Front (Question)

How to collect an aldehyde before it oxides into carboxylic acid?

Back (Answer)

Distillation Excess of alcohol

#24

Front (Question)

How to collect carboxylic acid?

Back (Answer)

Reflux Excess of oxidising agent