chem 4

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  • Created by: emma
  • Created on: 25-04-13 11:46
how do you make an acidic buffer?
from a weak acid and a soluble salt of that acid.
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at half-neutralisation point, PH
= PKa
2 of 7
how do you make a basic buffer?
a weak base and a salt of that base.
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how can optically active compunds be synthesised?
1) start with aldehyde 2)nucleophillic addition of CN-
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how do we get from nitrile to carboxilic acid?
1)react hydroxynitrile with HCL( hydrolysis) nitrile --> carb acid
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what are the options when a chiral drug is produced as a racemic mixture?
1) seperate isomers 2) sell mixture as drug 3) design an alternative synthesis that makes the required isomer only
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what intermolecular forces act in carboxilic acids?
dipole-dipole forces between molecules due to polar carbonyl group. boiling points of carboxilic acids are higher than those of comparable aldehydes, but lower than comparable alcohols as alcohols have hydrogen bonding.
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Card 2

Front

at half-neutralisation point, PH

Back

= PKa

Card 3

Front

how do you make a basic buffer?

Back

Preview of the front of card 3

Card 4

Front

how can optically active compunds be synthesised?

Back

Preview of the front of card 4

Card 5

Front

how do we get from nitrile to carboxilic acid?

Back

Preview of the front of card 5
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