5.4.2 - Carboxylic Acids Flashcards
What are carboxylic acids !?
Carboxylic acids are organic molecules containing a -COOH functional group
What does the start of a carboxylic acid name show !?
. The start of the name shows how many carbon atoms it has.
What does the end of a carboxylic acid name show !?
The end of the name is -oic acid to show it’s a carboxylic acid
Draw out this table
What is vinegar !?
Vinegar is an aqueous solution of ethanoic acid
How does vinegar form !?
Vinegar forms when the ethanol in wine undergoes microbial oxidation
Why does vinegar have a very sour, acrid taste !?
Vinegar has a very sour, acid taste because of the acidity of ethanoic acid
(red wine vinegar is the tastiest variety of vinegar)
Definition of an acid:
An acid is a H+ donor
Do carboxylic acids form salts !?
An acid is an H+ donor, so like all other acids Carboxylic acids can donate H+ to form a salt.
Process of a carboxylic acid becoming a salt :
The carboxylic acid group (-COOH) loses its H+ and becomes negatively charged
the name changes from ”-oic acid” in the carboxylic acid to ”-oate” in the salt
Word equation for carboxylic acid ➕ Metal :
Acid ➕ metal➡️ salt ➕hydrogen
Observations for carboxylic acid ➕ Metal :
. Effervescence, due to hydrogen gas being produced
.Solid disappears, due to metal being used up
Example of metal + carboxylic acid:
(methanoic acid➕ sodium)
Carboxylic acid ➕ metal carbonate word equation:
Acid➕metal ➡️ salt➕Water ➕ -. Carbonate Carbon dioxide
Observations for carboxylic acid ➕ Metal carbonate :
. Effervescence, due to carbon dioxide gas being produced
.Solid disappears, due to metal carbonate being used up
Example of metal carbonate + carboxylic acid:
(methanoic acid➕ sodium carbonate)
