Redox Reactions Flashcards

1
Q

What happens when a primary alcohol reacts with an oxidizing agent?

A

The primary alcohol is converted to an aldehyde

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

What is the primary alcohol converted into when it reacts with an oxidizing agent?

A

An aldehyde

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

What does a primary alcohol have to react with in order be converted into an aldehyde?

A

An oxidizing agent

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

What reacts with an oxidizing agent which is then converted to an aldehyde?

A

A primary alcohol

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

Name two suitable oxidizing agents which can convert a primary alcohol into an aldehyde

A

Acidified sodium dichromate (Na2Cr2O7) / sodium dichromate (VI)

Acidified potassium permanganate (KMnO4) /potassium manganate (VII)

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

What is the formula for acidified sodium dichromate/sodium dichromate (VI)?

A

Na2Cr2O7

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

What is the name of this agent Na2Cr2O7

A

Acidified sodium dichromate/ sodium dichromate VI

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

What is the name of the agent KMnO4

A

Acidified potassium permanganate/ potassium permanganate (VII)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the formula for Acidified potassium permanganate/ potassium permanganate (VII)

A

KMnO4

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

What happens if a primary alcohol reacts with an oxidizing agent in excess?

A

The primary alcohol is converted to an aldehyde which is further oxidized to a carboxylic acid

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

What is removed from the primary alcohol during an oxidation reaction?

A

Two hydrogen atoms are removed

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

How can it easily be seen that an oxidation reaction has taken place?

A

Two hydrogens have been lost from the primary alcohol

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

Where does the name aldehyde come from

A

ALcohol DEHYDrogenation

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

What happens to an aldehyde when it is oxidized

A

An extra oxygen atom is added to the aldehyde

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

How can it easily be seen that an aldehyde has been oxidized to a carboxylic acid

A

Aldehyde gains an oxygen atom

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

What forms when ethanol oxidizes?

A

Ethanoic acid (vinegar)

17
Q

Why can oxidation be a problem on wine making?

A

Ethanol in wine oxidizes to ethanoic acid if left open in the air

18
Q

What is formed from the oxidation of a secondary alcohol?

A

A ketone is formed

19
Q

An oxidation reaction of what forms a ketone?

A

A secondary reaction

20
Q

Give an example of a secondary alcohol

A

Propan-2-ol

21
Q

Give an example of a ketone

A

Propanone

22
Q

What happens when propan-2-ol reacts with acidified sodium dichromate?

A

Propanone is formed

23
Q

How can aldehydes and ketones be reduced back to alcohols?

A

In the presence of hydrogen and a nickel catalyst

24
Q

What happens to ethanal in the presence of hydrogen and a nickel catalyst?

A

It is reduced to ethanol (a primary alcohol)

25
Q

What happens to propanone in the presence of hydrogen and a nickel catalyst?

A

It is reduced to propan-2-ol (secondary alcohol)

26
Q

What are aldehydes reduced to?

A

Primary alcohols

27
Q

What are reduced to primary alcohols?

A

Aldehydes

28
Q

What are ketones reduced to?

A

Secondary alcohols

29
Q

What are reduced to secondary alcohols?

A

Ketones