Carboxylic acids
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Carboxylic Acids. These are organic acids. The most common one is ethanoic acid. The functional group is C OH O. Carboxylic Acids. Naming The prefix is the same as alkanes The suffix is –anoic acid. Hydrocarbons.

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Carboxylic Acids

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Carboxylic acids

Carboxylic Acids

  • These are organic acids.

  • The most common one is ethanoic acid.

  • The functional group is C OH

    O


Carboxylic acids1

Carboxylic Acids

  • Naming

  • The prefix is the same as alkanes

  • The suffix is –anoic acid


Hydrocarbons

Hydrocarbons

H H

H C C C OH

H H O

  • There are 3 carbons –Prop

  • Contains COOH –anoic acid

  • Name isPropanoic acid


Carboxylic acid

Carboxylic Acid

  • Carboxylic acids have acid properties.

  • They have a pH less than 7.

  • They are weak acids.

  • They react with metals to produce H2 and a salt.

  • They react with carbonates to produce CO2 , H2O, and a salt.


Carboxylic acids2

Carboxylic Acids

  • When carboxylic acids react they produce a negative ion.

  • Called –anoate ion

  • Eg ethanoic acid produces ethanoate ion

  • CH3COOH → CH3COO-


Carboxylic acids3

Carboxylic Acids

  • Ethanoic acid + magnesium

    magnesium ethanoate + hydrogen

    CH3COOH + Mg → (CH3COOH)2Mg + H2


Carboxylic acids4

Carboxylic acids

  • Carboxylic acids dissolve in water because they are polar compounds.

  • The –OH group at the end of the molecule makes the molecule polar.

  • If the carbon chain is too long then the acid loses its polar properties.


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