7.6 Esters Flashcards
1
Q
esterification
A
alkanol + alkanoic acid = water + ester
1
Q
ester suffix
A
-oate
2
Q
writing esters
A
write alkanol first then acid
3
Q
ethanol + methanoic acid =
A
ethyl methanoate
4
Q
4 uses of esters
A
- painkillers
- perfume
- food flavouring
- cosmetics
5
Q
what acid is used in small amt as catalyst
A
sulfuric
6
Q
hygrosopic meaning, use in esterification
A
removes water (product of esterification)
favours forward reaction
7
Q
keep reflux condenser top open because:
A
pressure would build and break the glassware
8
Q
Liebig or Vigreux condensers are used because
A
multiple glass nodules prevent alcohol from rising out
9
Q
why use reflux
A
allows hot vapour to rise, hit cold surface, drip back in
10
Q
transfer mixture to separation funnel steps:;/’
A
> remove lower layer
add aq Na2CO3 to neutralise acid
* ester is less dense
