1.4- Carboxylic Acids And Esters Flashcards

1
Q

Structure of carboxylic acid

A

R-C=OOH

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2
Q

Short vs longer carboxylic acids

A

Short chain dissolve in water easily because the hydrocarbon chain is short.
More soluble

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3
Q

Hydrocarbons chain solubility carboxylic acid

A

Insoluble

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4
Q

What can acids do?

A

-donate proton
-weak acids

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5
Q

Structure of esters and naming.

A

RC=OOR’
-R’ then R
-alkyl alkanoate
-alcohols + acid

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6
Q

Name this esters.
CH3COOCH2CH2CH3
HCOOCH(CH2Ch3)
CH3COOC6H6

A

1)Propyl ethanoate
2)ethylmethyl methanoate
3)phenyl ethanoate

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7
Q

Outline 1)mechanism and 2) reaction for forming propyl methanoate and 3)conditions
4)equation

A

1)esterification 2)condensation 3)H2SO4 conc catalyst + heat

4) propan-1-ol + methanoic acid > H2SO4 > propyl methanoate + water

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8
Q

Hydrolysis definition.

A

Breaking a bond using h20

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9
Q

ACID catalysed hydrolysis.
State products and acid used for
-propyl ethanoate

A

1) propyl ethanoate + h20 > H+ > propanol + ethanoic acid
2) ACID FORMS

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10
Q

BASE catalysed hydrolysis.
State intermediate products, final products and base used for
-propyl ethanoate

A

1) carboxylic + alcohol
2)acid reacts with h20 to form the base ester (SALT)
3) propyl ethanoate + h20 >NaOH > propanol and ethanoic acid
4) ethanoic + h20 > sodium ethanoate

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11
Q

TRIESTER ACID hydrolysis
Conditions ,reagent , products

A

1) reflux 2) acid conc catalyst
Lipid > fatty acid + glycerol
> carboxylic acid + propane-1,2,3-triol

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12
Q

BASE hydrolysis of tri esters.
Reagents, conditions, products

A

1) 3NaOH 2)reflux 3) SOAP/NaO-COR’ +
glycerol

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13
Q

Uses of esters and vegetables oils esters

A

-solvents
-perfumes
-plasticisers
-flavours
2) SOAP

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14
Q

Biodiesel formation

A

Methyl ester formed from hydrolysis of methanol + triester

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15
Q

Formation of methyl ester through base hydrolysis

A

Triester + 3CH3OH > NaOH > 3methylesters + glycerol

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