WM2: Active chemical bark

Question 1

Give the three environments we find an OH group in organic chemistry

Answer 1

Phenol
Carboxylic Acid
Alcohol

Question 2

What ion is formed that makes -OH groups acidic

Answer 2

Hydronium ion (H3O)+

Question 3

Put the following in order of increasing acidity
(low to high):
Phenol, Ethanol, Carboxylic acid

Answer 3

1. ethanol
2. phenol
3. carboxylic acid

Question 4

What is the test for the presence of phenol?

Answer 4

Iron (III) Chloride will turn purple in the presence of phenol

Question 5

What are the reagents needed for esterification

Answer 5

Alcohol, Carboxylic Acid, Acid Catalysts*

*Not really a reagent technically

Question 6

Which is less acidic, water or ethanol?

Answer 6

Ethanol

Question 7

What are the key steps in recrystalisation?

Answer 7

1. Select a solvent with high solubility at high temp and insoluble at low temperature
2. Dissolve in the minimum volume of hot solvent
3. Filter to remove insoluble impurities and collect the filtrate
4. Cool the filtrate and collect the crystals by vacuum filtrate
5. Dry the crystals in a low oven

Question 8

What is the ester functional group?

Answer 8

R-COOR