pre lab quiz 3 Flashcards
which have a hydroxl functional grp (-OH)
alcohols
alcohol has what kind of functional group
hydroxyl functional group (-OH)
alcohols undergo what reactions
oxidation
substitution
alcohols can be classified as
primary
secondary
tertiary
alcohols is classified based on their
degree on the substitution around C that contains the OH functionality
primary alcohols undergo…
dehydration
oxidation
primary alcohols form what during dehydration reactions
alkenes
primary alcohols uses what strong oxidizing agents
and forms what
potassium dichromate
aldehyde
what is the potassium dichromate used when oxidizing primary alcohols
strong oxidizing agent
when primary alcohols undergo further reaction after forming aldehydes, what do they form
carboxylic acid
why do primary alcohols cant react further form carboxylic acid
as it uses mild oxidation
secondary alcohols produce…
ketone
secondary alcohols are treated with…
oxidizing agents
what kind of alcohols can undergo oxidation
primary
secondary
what kind of alcohols are resistant to oxidation
tertiary
which alcohol undergo substitution reaction
tertiary
what alcohol has the -OH as their leaving group
tertiary
what type of alcohols are aromatic compounds
phenols/ phenolics
why are phenols or phenolic an aromatic compound
as they have benzene ring
phenols has a benzene ring that…
has an -OH group directly attached to it
how to confirm phenols or phenolic presence
by using ferric chloride (10drops)
what is the positive result of the phenols or phenolic
visible colored-complex
what is the title of this reaction
Reactions of Alcohols and Phenols
the objectives of this experiment is to:
classify alcohols as primary, secondary and tertiary
understand the chemical reactions that alcohol undergoes
name some of the reagents
ethanol
benzyl alcohol
jones reagent
lucas reagent
phenol
isopropanol
tert-butyl
baeyer’s reagent
1% FeCl3
name the instruments used
electric stove or
electric water bath
glassware and apparatus
10 test tube
2 test tube holder
1 wash bottle
1 stainless water bath
label how many test tubes by using codes for every sample
6
how do you label 6 test tubes at the preliminary preparations
using codes for every sample
place how many drops of each sample at the preliminary preparations
10 drops
what do we use for blank sample
distilled water
after each chemical reactions, make sure to…
wash all text tubes with liquid soap and water before proceeding
how many drops do we put for baeyer’s test
10 drops of baeyer’s test
how many drops do we put for jones oxidation test
6 drops of jones reagent
how many drops do we put for lucas test
20 drops of lucas reagent
how many drops do we put for ferric chloride test
10 drops
what do we note in lucas reaction
the time required for the formation of second layer or emulsion of alcohols
if there are no observable changes after 5 min in lucas test
heat the sample gently in boiling water bath for 2 min
in lucas test how long do u heat the sample in the boiling water
for 2 min
what should be placed under the fume hood
highly volatile solvent
highly volatile solvent should be placed…
under the fume hood
make sure what will not be left in beakers and droppers
excess amount of solvents
how to avoid contamination
by using the correct droppers to avoid contamination
have what in your pocket and for what
tissue paper for spills
what not to add in water
acid
use what to minimize trips going to the waste disposal area
extra beaker
dispose all organic waste in
non-halogenated waste
all organic waste with halogens should be disposed in
halogenated waste disposable
`anything with heavy metals should be disposed in
heavy metals waste bottle
why do tertiary may undergo substitution reaction
as -OH of a tertiary alcohol is a good leaving group
what are the samples used
ethanol
isopropanol
tert-butanol
benzyl alcohol
phenol
blank (distilled water)
