Organic practical work

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

Card preview (24)

Front (Question)

Describe how the student would prepare the standard solution, naming apparatus and method (3 marks)

Back (Answer)

• Dissolve solid in (distilled) water (less than 250 cm3) in beaker • Transfer (solution) to volumetric flask AND Transfer washings (from beaker) to flask • Make up to mark/up to 250 cm3 with (distilled) water AND Invert flask (several times to ensure mixing)

Front (Question)

What does recrystallisation do

Back (Answer)

Purifies solids

Front (Question)

What is the first step in recrystallisation

Back (Answer)

Dissolve solid in the minimum volume of hot solvent

Front (Question)

After you’ve dissolved the solid in hot solvent when recrystallising, what is the next step

Back (Answer)

Allow the solution to cool down slowly, crystals will start to form

Front (Question)

What is the name of the flask involved in reduced pressure filtration

Back (Answer)

Buchner

Front (Question)

After allowing the solution to cool when recrystallising, what is the next step

Back (Answer)

Filter to remove the impurities in the solution and obtain the purified solid crystals

Front (Question)

What is used to wash the purified crystals

Back (Answer)

Very cold solvent

Front (Question)

Why must the solvent be cold when washing the crystals after recrystallisation

Back (Answer)

So solid product doesn’t dissolve again

Front (Question)

What is the final step in recrystallisation

Back (Answer)

Leave crystals to dry

#10

Front (Question)

If a substance contains impurities, will the melting point be lower or higher than data book values

Back (Answer)

Lower

#11

Front (Question)

If the substance contains impurities, will the temperature range be smaller or larger than data book values

Back (Answer)

Larger range

#12

Front (Question)

What is the typical reaction of alkanes

Back (Answer)

Radical substitution

#13

Front (Question)

What is the typical reaction of alkenes

Back (Answer)

Electrophilic addition

#14

Front (Question)

What are the properties of alkenes

Back (Answer)

• Electron rich double bond • Non-polar bond

#15

Front (Question)

What are the properties of aromatic compounds

Back (Answer)

• Delocalised electron ring • Stable

#16

Front (Question)

What is the typical reaction of aromatic compounds

Back (Answer)

Electrophilic substitution

#17

Front (Question)

What are the 2 properties of alcohols

Back (Answer)

• Lone pair on oxygen can act as a nucleophile • Polar C-OH bond

#18

Front (Question)

What are the 2 typical reactions with alcohols

Back (Answer)

• Esterification and nucleophilic substitution • Dehydration/ elimination and nucleophilic substituion

#19

Front (Question)

What is the property of haloalkanes

Back (Answer)

Polar C-X bond

#20

Front (Question)

What is the typical reaction involving haloalkanes

Back (Answer)

Nucleophilic substitution and elimination

#21

Front (Question)

Properties of nitriles

Back (Answer)

Electron deficient carbon centre

#22

Front (Question)

Typical reaction of nitrile

Back (Answer)

Reduction and hydrolysis

#23

Front (Question)

Properties of amines

Back (Answer)

Lone pair on the nitrogen is basic, can act as a nucleophile

#24

Front (Question)

Typical reaction of amines

Back (Answer)

Nucleophilic substitution and neutralisation