3.6 carboxylic acids

Carboxylic acids: most important organic acids, week acids

What makes it acid: the H⁺-ion

Carbon dubble bonded to a oxygen (keeps the valenceshell) and one of the oxygens are conected to a hydro

-COOH-: carboxyl group, known in carboxylic acids

Maursyre: methanoic acids

Simplest carboxylic acid: methanoic acid. "maursyre", occurs if you have been biten by a ant or touched brennesle. +

If wine is out for too long it creats: Acitic acid/eddiksyre

 systematic name for Acitic acid/eddiksyre: etanoic acid, contains equally much carbons like etane.

Carbonxylic acids with more than 3 C-atoms: called fatty acids

Carboxylic acids dompared to the unorganic acids: it is weak

The reason carbonxylic acid is weak:  for example, the ethanoic acid disolves in water it separates (dissociate) into ions

Ethanoic acid dissociation into ions:  gives littel H+-ion in a water solution.

Ethane acid disolved in water, formula: +

Reason why the carboxylic acid is sour: innehlder oksoniumioner H₃O⁺-ioner = H⁺_, the more there are -> more acidic

• Lacticacid/melkesyre

• What kind of acid lacticacid(melkesyre) is: a carboxylic acid, but also contains hydroxl groups -> a hydroxide acid.

lacticacid in the body: made in the muscle and surface of the skin

lacticcid in the industry: milkproducts,

lacticacids purpose on the skin: makes a sour enviorments to protect from harmfull bacteria.

What makes our musles sore: milkacid, made when the muscles work without oxygen -> made when "nedbrytning av glukose" and makes the muscle stiff.

lacticacid formula: +