Brainscape's Knowledge GenomeTM

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


See full index

Organic Chemistry > Lab Exam. > Flashcards

Lab Exam. 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 structure of salicylic acid?

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

What is the structure of aspirin?

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

What is the reaction for salicylic acid with acetal chloride/pyridine?

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

What is the reaction for aspirin with acetal chloride/pyridine?

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

What is the reaction for salicylic acid with methanol/HCl/heat?

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

What is the reaction for aspirin with methanol/HCl/heat?

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

What is the reaction for salicylic acid with sodium bicarbonate at room temperature?

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

What is the reaction for aspirin with sodium bicarbonate at room temperature?

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

What is the reaction for salicylic acid with thionyl chloride?

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

What is the reaction for aspirin with thionyl chloride?

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

What is the reaction for salicylic acid with 10% sodium hydroxide at room temperature?

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

What is the reaction for aspirin with 10% sodium hydroxide at room temperature?

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

What is the reaction for salicylic acid with excess sodium hydroxide at room temperature?

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

What is the reaction for aspirin with excess sodium hydroxide at room temperature?

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

What is the reaction for salicylic acid with ammonium hydroxide at room temperature?

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

What is the purpose of phosphoric acid in the aspirin lab?

A

It acts as a catalyst which will quicken the reaction by protonating the carbonyl group on the anhydride.

17
Q

What is the purpose of water in the aspirin lab?

A

Water removes any excess acetic anhydride.

18
Q

What is the purpose of ice in the aspirin lab?

A

Ice accelerates crystallisation and increases the yield of the product. It also precipitates the aspirin which is then recrystallised to water.

19
Q

What is the purpose of ethanol in the aspirin lab?

A

To purify and dissolve the crystals.

20
Q

For the caffeine lab, how do you calculate the percent recovery?

A

Actual yield * 100% / theoretical yield. Actual yield is the mass of caffeine. Theoretical yield is the mass of caffeine * mass of tea bags.

21
Q

In the caffeine lab, suppose you forgot to add sodium carbonate to the tea solution prior to extraction?

A

The sodium carbonate acts as a base. When you boil tea, tannins and caffeine dissolve in the water. If a base is not used then the tannins will be extracted into the solvent. The base converts the tannins into sodium salts which are ionic and are not soluble so will remain in the aqueous layer and allow pure caffeine to be extracted.

22
Q

What is the equation for ethanol with Na?

A
23
Q

What is the equation for ethanol with NaOH?

A

CH3-CH2-O(-)-Na(+) and H2O

24
Q

What is the equation for ethanol with Na2CO3?

A

No reaction

25
Q

What is the equation for phenol with Na?

A

Picture

26
Q

What is the equation for phenol with NaOH?

A

Picture

27
Q

What is the equation for phenol with Na2CO3?

A

Picture

28
Q

What is the equation for ethanoic acid with Na?

A

Picture

29
Q

What is the equation for ethanoic acid with NaOH?

A

Picture

30
Q

What is the equation for ethanoic acid with Na2CO3?

A

Picture

31
Q

In the ethyl acetate lab what is the equation for the formation of ethyl acetate?

A

CH3CH2OH + CH3COOH = CH3COOCH2CH3 + H2O

32
Q

In the ethyl acetate lab, what is the purpose of sulphuric acid?

A

The sulphuric acid is used because it will catalyse the esterification reaction. It also removes a water molecule from the reaction and is therefore responsible for the dehydration reaction.

33
Q

In the ethyl acetate lab, what happens if water is removed from the reaction mixture?

A

If water is removed from the reaction, the overall equilibrium of the reaction will shift to the right which will form more products. If more products are formed the system will reach equilibrium.

34
Q

In the ethyl acetate lab, what products are formed when ethanol is oxidised by sodium dichromate?

A

CH3-COOH

35
Q

What is the reaction for aspirin with ammonium hydroxide at room temperature?

A

Organic Chemistry (9 decks)

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