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2023 SEM 1 INORG & ORG CHEM > pre lab quiz 3 > Flashcards

pre lab quiz 3 Flashcards

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1
Q

which have a hydroxl functional grp (-OH)

A

alcohols

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2
Q

alcohol has what kind of functional group

A

hydroxyl functional group (-OH)

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3
Q

alcohols undergo what reactions

A

oxidation
substitution

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4
Q

alcohols can be classified as

A

primary
secondary
tertiary

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5
Q

alcohols is classified based on their

A

degree on the substitution around C that contains the OH functionality

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6
Q

primary alcohols undergo…

A

dehydration
oxidation

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7
Q

primary alcohols form what during dehydration reactions

A

alkenes

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8
Q

primary alcohols uses what strong oxidizing agents
and forms what

A

potassium dichromate
aldehyde

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9
Q

what is the potassium dichromate used when oxidizing primary alcohols

A

strong oxidizing agent

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10
Q

when primary alcohols undergo further reaction after forming aldehydes, what do they form

A

carboxylic acid

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11
Q

why do primary alcohols cant react further form carboxylic acid

A

as it uses mild oxidation

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12
Q

secondary alcohols produce…

A

ketone

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13
Q

secondary alcohols are treated with…

A

oxidizing agents

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14
Q

what kind of alcohols can undergo oxidation

A

primary
secondary

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15
Q

what kind of alcohols are resistant to oxidation

A

tertiary

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16
Q

which alcohol undergo substitution reaction

A

tertiary

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17
Q

what alcohol has the -OH as their leaving group

A

tertiary

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18
Q

what type of alcohols are aromatic compounds

A

phenols/ phenolics

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19
Q

why are phenols or phenolic an aromatic compound

A

as they have benzene ring

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20
Q

phenols has a benzene ring that…

A

has an -OH group directly attached to it

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21
Q

how to confirm phenols or phenolic presence

A

by using ferric chloride (10drops)

22
Q

what is the positive result of the phenols or phenolic

A

visible colored-complex

23
Q

what is the title of this reaction

A

Reactions of Alcohols and Phenols

24
Q

the objectives of this experiment is to:

A

classify alcohols as primary, secondary and tertiary
understand the chemical reactions that alcohol undergoes

25
Q

name some of the reagents

A

ethanol
benzyl alcohol
jones reagent
lucas reagent
phenol
isopropanol
tert-butyl
baeyer’s reagent
1% FeCl3

26
Q

name the instruments used

A

electric stove or
electric water bath

27
Q

glassware and apparatus

A

10 test tube
2 test tube holder
1 wash bottle
1 stainless water bath

28
Q

label how many test tubes by using codes for every sample

A

6

29
Q

how do you label 6 test tubes at the preliminary preparations

A

using codes for every sample

30
Q

place how many drops of each sample at the preliminary preparations

A

10 drops

31
Q

what do we use for blank sample

A

distilled water

32
Q

after each chemical reactions, make sure to…

A

wash all text tubes with liquid soap and water before proceeding

33
Q

how many drops do we put for baeyer’s test

A

10 drops of baeyer’s test

34
Q

how many drops do we put for jones oxidation test

A

6 drops of jones reagent

35
Q

how many drops do we put for lucas test

A

20 drops of lucas reagent

36
Q

how many drops do we put for ferric chloride test

A

10 drops

37
Q

what do we note in lucas reaction

A

the time required for the formation of second layer or emulsion of alcohols

38
Q

if there are no observable changes after 5 min in lucas test

A

heat the sample gently in boiling water bath for 2 min

39
Q

in lucas test how long do u heat the sample in the boiling water

A

for 2 min

40
Q

what should be placed under the fume hood

A

highly volatile solvent

41
Q

highly volatile solvent should be placed…

A

under the fume hood

42
Q

make sure what will not be left in beakers and droppers

A

excess amount of solvents

43
Q

how to avoid contamination

A

by using the correct droppers to avoid contamination

44
Q

have what in your pocket and for what

A

tissue paper for spills

45
Q

what not to add in water

A

acid

46
Q

use what to minimize trips going to the waste disposal area

A

extra beaker

47
Q

dispose all organic waste in

A

non-halogenated waste

48
Q

all organic waste with halogens should be disposed in

A

halogenated waste disposable

49
Q

`anything with heavy metals should be disposed in

A

heavy metals waste bottle

50
Q

why do tertiary may undergo substitution reaction

A

as -OH of a tertiary alcohol is a good leaving group

51
Q

what are the samples used

A

ethanol
isopropanol
tert-butanol
benzyl alcohol
phenol
blank (distilled water)

2023 SEM 1 INORG & ORG CHEM (22 decks)

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