1 / 12

Carboxylic Acids and Esters

Carboxylic Acids and Esters. By: Navneet , Farah, Christina and Cindy. What is it?. Carboxylic Acids: Weak acids Found in citrus fruit -COOH Esters: Found in plants Odours . Etserification.

shina
Download Presentation

Carboxylic Acids and Esters

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Carboxylic Acidsand Esters By: Navneet, Farah, Christina and Cindy

  2. What is it? Carboxylic Acids: • Weak acids • Found in citrus fruit • -COOH Esters: • Found in plants • Odours

  3. Etserification • A carboxylic acid reacts with an alcohol, in the presence of a catalyst, forming an ester and water. This condensation reaction is known as esterification.     CH3COOH + CH3CH2OH concentrated H2SO4 CH3COOCH2CH3 + H2Oethanoic acid + ethanol          catalyst (H2SO4)        ethyl ethanoate   + water   • sulfuric acid is our catalyst. • The –OH from the alcohol bonds with the H from the ethanoic acid

  4. Oxidation of Aldehyde Aldehyde + Oxygen  Carboxylic Acid

  5. AmideSynthesis Carboxylic Acid + Amine  Amide + Water

  6. Hydrolysis • When an ester is treated with an acid or base and water, reverse esterification occurs. CH3COOCH2CH3 + H2O dilute H2SO4 CH3COOH + CH3CH2OH • catalyst = dilute sulfuric acid

  7. Saponification • Saponification occurs when an ester reacts with a strong base. This reaction is not reversible due to the carboxylate salt that is formed at the end of the reaction.   • The sodium salt of the carboxylic acid that result are what we call soap. This process is called saponification.

  8. Industrial Uses • synthetic odours and flavours • Ex. Benzyl acetate, from acetic acid, has a jasmine odour • ester ethyl acetate= nail polish remover • fatty acids are used in the manufacture of soaps, detergents and shampoos

  9. Environmental Impact Pesticides/Herbicides Octyl Phenoxy Polyethoxy Enthanol Phosphate Ester • Pesticide, highly toxic Acetic acid • 10% - 20% [c]= 80% - 100% effectiveness • organic compound, not harmful to environment (long term) PFOA /PFOS PFOA = Perflouro Octanoic Acid PFOS = Perfluoro Octane Sulfuric Acid • man-made product • highly stable structure

  10. Summary Carboxylicacid Esterification • Carboxylic Acid + Alcohol  Ester + Water Oxidation of Aldehyde • Aldehyde + Oxygen  Carboxylic Acid AmideSynthesis • Carboxylic Acid + Amine  Amide + Water Esters Condensation reaction • Alcohol + Carboxylic Acid  Ester Hydrolysisreaction (saponification) • Ester + Base  Carboxylic Salt + Alcohol

  11. Quiz!  • What does PFOA stand for? • Most important industrial applications of compounds with carboxyl groups is the use of . • What is the definition of an ester? • What is the name of the reaction that splits a product into an acid and a alcohol? • Why does the melting point rise when there are more carboxylic acids present?

  12. Bibliography "Environment Canada - Acts & Regulations - Draft Screening Assessment Perfluorooctanoic Acid, its Salts, and its Precursors."Environnement Canada - Environment Canada. N.p., n.d. Web. 24 Mar. 2012. <http://www.ec.gc.ca/lcpe-cepa/default.asp?lang=En&n=705376A7-1&offset=10&toc=show>. "Environmental Fate of Pesticides."BC Ministry of Agriculture, Food and Fisheries. N.p., n.d. Web. 24 Mar. 2012. <http://www.agf.gov.bc.ca/pesticides/c_2.htm>. Shapley, Dan. " Food Packaging Chemicals- PFOS and PFOA Chemicals from Food Packaging - The Daily Green."Going Green, Fuel Efficiency, Organic Food, and Green Living - The Daily Green. N.p., n.d. Web. 24 Mar. 2012. <http://www.thedailygreen.com/environmental-news/latest/packaging-chemicals-47050101>.

More Related