Refer to the figure below showing the chemical structures of

Refer to the figure below showing the chemical structures of cis- and trans-isomers of oleic acid. The trans-oleic, also known as elaidic acid, is the main trans fat in the hydrogenated vegetable oil found in food. (Note: Each single line represents a single covalent bond. Carbons are at the vertices and are not labeled).

1) These fatty acids are acidic because of the presence of a _______ in the molecules.

a) carboxyl group (—COOH)
b)hydroxyl group (—OH)
c)C—OH bond
d)C=C double bond
e)All of the above

2)When 0.1 mole of sodium hydroxide (NaOH) is added to 1 liter of water, it ionizes, releasing OH– and Na+ ions. The resulting solution is

a) acidic

b) molar

c) basic

d) a buffer

e) neutral

1) These fatty acids are acidic because of the presence of a _______ in the molecules. a) carboxyl group (—COOH) b)hydroxyl group (—OH) c)C—OH bond d)C=C double bond e)All of the above 2)When 0.1 mole of sodium hydroxide (NaOH) is added to 1 liter of water, it ionizes, releasing OH– and Na+ ions. The resulting solution is a) acidic b) molar c) basic d) a buffer e) neutral

HO HO trans-Oleic acid cis-Oleic acid

Solution

Answer:

1). a) carboxyl group (—COOH)

The carboxyl group (—COOH) represents acid as it carboxylic acid (-COOH)

2). c) basic