Carboxylic Acids Flashcards
(22 cards)
Functional group of carboxylic acids:
-COOH
How are carboxylic acids formed?
Reaction of alcohol with oxidising agent.
Examples of things with carboxylic acid?
ant bites
stinging nettles
butter
aspirin
Ethanoic Acid
- H
I
H-C-C = O
I I
H OH
Carboxylic acids are acids, so they…
release hydrogen ions in water.
When we say that carboxylic acids have a higher pH than a strong acid at the same concentration, it means…
that carboxylic acids are weaker acids compared to strong acids.
Reaction of carboxylic acid with water:
dissolves in water to form an acidic solution
Reaction of carboxylic acid with metal:
although it is slower than with a strong acid, bubbling is still seen. This means that a gas is given off, that gas being hydrogen.
products: salt + hydrogen
Reaction of carboxylic acid with carbonate:
Fizzing indicates that a gas is made:
salt + water + CO2
Reaction of carboxylic acid with alcohol:
ESTER MADE
How are esters made and in what conditions?
They are made by reacting an alcohol with a carboxylic acid and heat or an acid catalyst is required. The reaction is a reversible reaction.
Esters can be synthetically or naturally formed chemicals. they are used in…
perfumes and flavourings
Ethanoic acid + ethanol makes…
Ethyl Ethanoate + water
general formula
Cn H2n + 1 COOH
1 carbon
methanoic acid
2 carbon
ethanoic acid
3 carbon
propanoic acid
4 carbon
butanoic acid
When writing the ionisation (weak acids) we use…
reversible arrows
how are the negative ions formed when the carboxylic acids are ionised named?
end in ‘anoate’ rather an ‘anoic’
butanoic acid - butanoate ion + H+
products of ethanoic acid + potassium carbonate
potassium ethanoate + water + carbon dioxide
Carboxylic acids are made by oxidising…
an alcohol with an oxidising agent.
