Stuff I Don't Know (P2)

Question 1

What aromatic compounds will NaOH (metal hydroxide) react with?

Answer 1

• Phenol (OH)
• Carboxylic acid (OH)

Question 2

What functional group with Na2CO3 (metal carbonate) react with?

Answer 2

Only OH of carboxylic acid

Not alcohol

Question 3

What does an ester link look like?

Answer 3

Question 4

What does an amide link look like?

Answer 4

Question 5

How do you name an ester?

Answer 5

• Thyl from alcohol
• Oate from acid/anhydride

When you draw it thyl is on the right

Question 6

What is an optical isomer?

Answer 6

Non-super imposable mirror images

Question 7

How do you test for a carboxylic acid + what will you observe?

Answer 7

• Use sodium carbonate
• Fizzing / bubbling if present

Question 8

How do you test for an alcohol + what would you observe?

Answer 8

• Add acidifed potassium dichromate
• If present orange - green

Question 9

Does bromine react more readily with benzene of phenol - why?

Answer 9

Phenol:
* Lone pair is delocalised into ring
* Increases electron density
* Br2 (electrophile) is more polarised

Question 10

Are esters biodegradable and if so why?

Answer 10

Yes - ester bond can be hydrolysed

Question 11

What is a Zwitterion

Answer 11

Neutral molecule with postive + negative charge

Eg. amino acid

Question 12

How do you know if a reaction is nucleophillic or electrophillic?

Answer 12

• Nucleophillic - if arrow goes from small compound to big compound
• Electrophillic - if arrow goes from big compound to small compound

This is nucleophillic