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Flashcards in WM.2 Deck (14)
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1
Q

What are two ways to test for a COOH functional group?

A
  1. Aqueous solution would be indicated as a weak acid.

2. Reacts with an alcohol to produce an ester which has a pleasant smell of fruit or flowers.

2
Q

What is a phenol group?

A

An OH group attached to a benzene ring.

3
Q

What does derivatives of carboxylic acid mean?

A

The OH in the carboxyl group can be replaced by other groups.

4
Q

what are two derivatives of carboxylic acid?

A
  • Ester: RCOOR

- Acid anhydride: (RCO)2O

5
Q

What are three different environments a hydroxyl group(OH) can occur in an organic compound?

A
  1. As part of a carboxyl group in carboxylic acids.
  2. Attached to an alkane chain as an alcohol.
  3. Attached to a benzene ring as a phenol.
6
Q

What happens when an OH group is reacted with water?

A

ROH + H2O ⇌ RO- + H3O+

7
Q

What is the equation that shows the dissociation of water molecules which shows it behaves as a weak acid?

A

HOH + H2O ⇌ HO- + H3O+

8
Q

Rank alcohol, phenol, carboxylic acid and water in order of acidity, from the weakest to the strongest.

A

Alcohol < water < phenol < carboxylic acid

9
Q

Can phenols react with carboxylic acids to produce esters?

A

No.

10
Q

Carboxylic acids can react with carbonates to produce carbon dioxide. Can phenols react with carbonates too?

A

No.

11
Q

What can you react with phenols to produce esters?

A

Acid anhydrides.

12
Q

In what conditions can phenols react with acid anhydrides to produce ester?

A

Alkaline conditions.

13
Q

What is a way of testing for phenol and its derivatives?

A

It turns purple in the presence of neutral iron chloride solution.

14
Q

What is the product when esterifying the phenol group of 2-hydroxylbenzoic acid (salicylic acid)?

A

Aspirin.