6.2.5 organic synthesis
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give the test for carbonyls
add 2,4-DNPH orange precipitate forms, purify crystals to determine melting point and compare to a database
give the test for aldehydes
add Tollen’s reagent and heat or add acidified KCrO7^2- silver mirror precipitate or yellow to green
give the test for carboxylic acids
add sodium carbonate effervescence and gas forms white ppt in limewater
give the test for phenol
add universal indicator orange as weakly acidic
give the test for primary alcohol
add KCrO7^2- and dil H2SO4 and warm gently then add tollen’s reagent and heat yellow to green then silver mirror
give the test for secondary alcohols
add KCrO7^2- and dil H2SO4 and warm gently then add tollen’s reagent and heat yellow to green then no observed change
give the test for tertiary alcohols
add KCrO7^2- and dil H2SO4 and warm gently no observed change