Activity No. 11

Question 1

it is an organic compound that is formed when carboxylic acid reacts with an alcohol

Answer 1

Ester

Question 2

This process typically requires a catalyst to speed the reaction.

Answer 2

Esterification

Question 3

What was used as a catalyst for this experiment

Answer 3

Concentrated Sulfuric acid (H2SO4)

Question 4

a very dangerous chemical which can cause severe chemical burns when in contact with all human tissues

Answer 4

Sulfuric acid

Question 5

What will happen when carboxylic acids are esterified (combined w/ an alcohol to form an ester)?

Answer 5

Some of the resulting esters are liquids with fruity scents or flavors

Question 6

What compound is responsible for the characteristic flavors of fruits

Answer 6

esters

Question 7

2 drops Acetic acid + Propanol —->
(a) product: _______
(b) odor: _______

Answer 7

(a) Propyl acetate
(b) Pear

Question 8

2 drops Acetic acid + Butanol —->
(a) product: _______
(b) odor: _______

Answer 8

(a) Butyl acetate
(b) Banana

Question 9

2 drops Acetic acid + Octanol —->
(a) product: _______
(b) odor: _______

Answer 9

(a) Octyl ethanoate
(b) Orange

Question 10

2 drops acetic acid + 2-methylpropanol —->
(a) product: _______
(b) odor: _______

Answer 10

(a) 2-Methylpropyl acetate
(b) Apple

Question 11

0.2 grams Salicylic acid + Methanol —->
(a) product: _______
(b) odor: _______

Answer 11

(a) Methyl salicylate
(b) Wintergreen

Question 12

what mechanism is incorporated in the synthesis of fragrant esters

Answer 12

Nucleophilic Acyl Substitution

Question 13

PROCEDURE:
Step 1(activity #11)

Answer 13

Place the first acid using the specified amount into a dry 10-cm test tube. Then, add 6 drops of the corresponding alcohol and agitate the tube until the contents are well mixed

Question 14

PROCEDURE:
Step 2 (activity #11)

Answer 14

Add 1 drop of concentrated sulfuric acid. shake the tube contents and place the tube in a beaker of boiling water for 3 mins.

Question 15

PROCEDURE:
Step 3 (act #11)

Answer 15

After heating, remove the tube from the bath and add 15 drops of water to the tube contents. Note and record the odor of the product.

Question 16

give atleast 6 commercial products that contain oil of wintergreen

Answer 16

1. omega
2. efficascent oil extreme
3. Katinko ointment
4. Listerine Cool Mint mouthwash
5. White flower embrocation
6. Salonpas

Question 17

what is the difference between artificial flavoring and natural flavoring

Answer 17

Natural flavorings are extracted directly from plants, animals or plant and animals products as found in nature. Whereas artificial flavors are those not extracted from nature but rather reproduced in the lab

Question 18

Give the name of the ester responsible for the ff. flavor:

(a) Pineapple

Answer 18

Ethyl butanoate

Question 19

Give the name of the ester responsible for the ff. flavor:

(b) Strawberry

Answer 19

Methyl butanoate

Question 20

Give the name of the ester responsible for the ff. flavor:

(c) Rhum

Answer 20

Ethyl propanoate

Question 21

Give the name of the ester responsible for the ff. flavor:

(d) Orange

Answer 21

Octyl ethanoate

Question 22

title of activity #11

Answer 22

Synthesis of fragrant esters