Topic: Function Group #6: Carboxlyic Acids (Organic Acids) Do Now: Define an Arrhenius Acid.

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Presentation transcript:

Topic: Function Group #6: Carboxlyic Acids (Organic Acids) Do Now: Define an Arrhenius Acid

Carboxylic Acids are electrolytes! General Formula: Contains: carbonyl group AND hydroxyl group bonded to same C H is acidic; so ionizes in water! Carboxylic Acids are electrolytes! Acidic H +

Which of the following is an electrolyte? A.CH 3 OH B.CH 3 COOH C.CH 2 O D.C 3 H 6 O Correct answer is B, the carboxylic acid alcohol aldehyde ketone

Which of the following is a nonelectrolyte? A.HCl B.CH 3 COOH C.NaOH D.CH 3 OH Correct answer is D, an alcohol

Properties of Carboxylic Acids H bonded to O therefore hydrogen bonds –Leads to ↑ BP over corresponding alkane pretty soluble in water

Naming Carboxylic Acids Never Never needs number: – functional group always at end Find name corresponding hydrocarbon – Drop -e & add -oic + acid

H  C  OH = O 1 C  methane Methanoic acid Sting in red ants, bees H H  C  C  OH H = O Ethanoic Acid Acetic acid 2 C  ethane

CH 3 CH 2 CH 2 CH 2 COOH 5 C ’ s  pentane so the name is pentanoic acid

Common carboxylic acids Acetic acid – vinegar – produced in doughs leavened with specific yeast (ex: sourdough bread) Citric acid Tannic acid Ascorbic acid Lactic acid – Poly(lactic acid) – biodegradable polymers used as sutures in internal surgery