Carboxylic acids

HideShow resource information
  • Created by: Lina
  • Created on: 07-04-14 07:21
What is the functional group of carboxylic acids?
-COOH
1 of 20
The homologous series of carboxylic acids includes...
Methanoic acid, ethanoic acid, propanoic acid
2 of 20
Molecular formula of methanoic acid
HCOOH
3 of 20
Molecular formula of ethanoic acid
CH3COOH
4 of 20
Molecular formula of propanoic acid
CH3CH2COOH
5 of 20
Trend in b.p.
Methanoic- low; propanoic- high
6 of 20
Trend in density
Methanoic- high; propanoic- low
7 of 20
Why do carboxylic acids have similar chemical properties?
They have the same functional group
8 of 20
What happens to carboxylic acids when they dissolve in water?
Make acidic solution, with pH less than 7
9 of 20
What happens to carboxylic acids when they react with carbonates?
Produce CO2+ Water+ a salt (....anoate)
10 of 20
Why do carboxylic acids dissolve in water to produce acidic solutions?
They ionise+ release H+ ions- responsible for making solutions acidic.
11 of 20
Why do carboxylic acids only form weak acidic solutions?
They don't ionise completely- not many H+ ions are released
12 of 20
What does high pH mean?
Less acidic- less H+ ions in the water
13 of 20
Uses of carboxylic acids
Vinegar- solution of ethanoic acid; cirtric acid- added to drinks to give them a sour taste; aspirin- painkiller taken by people at risk of heart attack- reduces blood clotting; fruits+ veggies contain ascorbic acid, vitamin C;preparation of esters
14 of 20
What are carboxylic acids with longer chains of carbon atoms used for?
Soaps and detergents
15 of 20
Why does an ethanoic acid molecule get ionised when it dissolves in water?
A hydrogen ion may leave its functional group. The acid molecule splits up to form ions.
16 of 20
What does it mean when an acid is fully ionised?
It is strong and is completely ionised in solution
17 of 20
What is pH?
A measure of the concentration of hydrogen ions, H+ in solution
18 of 20
What does 'concentrated' acid mean?
It has a greater amount of acid dissolved in a certain volume of solution than a more dilute solution of the same acid
19 of 20
What does 'strong' acid mean?
An acid which ionises completely+ has a low pH-> a higher concentration of H+ ions dissolved in the acid
20 of 20

Other cards in this set

Card 2

Front

The homologous series of carboxylic acids includes...

Back

Methanoic acid, ethanoic acid, propanoic acid

Card 3

Front

Molecular formula of methanoic acid

Back

Preview of the front of card 3

Card 4

Front

Molecular formula of ethanoic acid

Back

Preview of the front of card 4

Card 5

Front

Molecular formula of propanoic acid

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Chemistry resources:

See all Chemistry resources »See all Acids, bases and salts resources »