Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Chemistry > RPA - polymers > Flashcards

RPA - polymers Flashcards

You may prefer our related Brainscape-certified flashcards:
Periodic Table flashcards Chemistry 101 flashcards AP® Chemistry flashcards Organic Chemistry 101 flashcards
1
Q

What is the name of polymers formed from amino acids?

A

Polypeptides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the type of reaction involved in synthesis of polypeptides?

A

Condensation reaction (elimination of H2O)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the linkage formed when amino acid polymerised?

A

Amide group O=C-N-H

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the difference between polypeiptide and protein?

A

Protein has at least 50 protein monomers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What are the possible products when two amino acids react?

A

the first bonded to second, the second bonded to first/ Normally written N–>C

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What group of polymers are polypeptides in?

A

polyamides

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the other way of synthesizing polyamide without amino acid?

A

di-amine and dicarboxylic acid to form amide bond

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

when a polypeptide is hydrolised in acid, what is are the products?

A 
Ammonium ion (protonated amine group)
normal carboxylic acid group
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the product when a polypeptide is hydrolyzed in alkali solution?

A

Amino acid with COO-Na+ ion

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are the conditions when polypeptide undergoes acid hydrolysis?

A

6M HCl

25H reflux

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

what are the conditions when polypeptide is hydrolyzed in alkali?

A

100 C

NaOH(aq)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the two types of condensation polymers?

A

Polyamides, polyesters

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

How to you separate amino acids having hydrolyzed it?

A

TLC

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where do you measure the Rf value from?

A

Top of the spot.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What are the two ways of forming a polyester?

A

dicarboxylic acid + diol

e.g. 3-hydroxy butanoic acid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

When polyester formed, where are the groups lost to eliminate water?

A

OH from COOH, H from -OH

17
Q

What are the products from when polyesters hydrolyzed in acid conditions?

A

Just monomers formed (dicarboxylic acid/diol)

18
Q

What are the products when polyesters hydrolyzed in alkali conditions?

A

Carboxylate salt formed, alcohol formed as normal.

19
Q

What are the products when polyamides hydrolyzed in acid conditions?

A

carboxylic acid + ammonium salt of amine (H3N+)

20
Q

What are the producs when polyamides hydrolyzed in alkali conditions?

A

Di-carboxylate ion and amine.

21
Q

What is characteristic of an amide bond?

A

O=C-N-H

22
Q

What two types of monomers are required for synthesis of polyamide?

A

Diamine + dicarboxylic acid

23
Q

What does it mean if a polyester is biodegradable?

A

It can be hydrolzed by microorgnisms to reform the monomers

24
Q

Give two uses of polyamides

A

nylon, kevlar

25
Q

In a polyester synthesized from dicarboxylic acid + diol, what is the repeat unit?

A

One section of diarboxylic acid + diol containing one ester linkage

26
Q

In polyamide synthesized from diamine + dicarboxylic acid, what is the repear unit?

A

one section of dicarboxylic acid + diamine with one amide bond

27
Q

How can a polyester be formed from a single monomer?

A

use a carboxylic acid w/hydroxyl group e.g. 3-hydroxy butanoic acid

28
Q

How can a polyamide be formed from a single monomer unit?

A

Use carboxylic acid with amine group on the other end i.e. amino acid

29
Q

What is the stoichiometric ratio of monomer:polymer:water molecules in condensation polymerisation?

A

n:n:(2n-1)

30
Q

Why is the stoichiometric ratio for water molecules 2n-1?

A

For each ester/amide linkage, one molecule of water is lost. Each monomer is linked to the loss of two molecules of water (one from each end), and except for the final link in the chain, which remains with hydrogens

Chemistry (16 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions