what is a simple test to detect the presence of a carbonyl and to identify it?
A carbonyl is either a ketone or an aldehyde. In order to see whether the carbonyl group is present (C double bond O), 2,4-dinitrophenylhydrazine must be used. If an orange/yellow precipate is formed, then a carbonyl group is present. Then, you must purify the precipitate by recrystalisation and measure its melting point. then compare the melting point to known values to determine the compounds identity.
ZM
Related Chemistry A Level answers
All answers ▸Why does phenol readily undergo electrophilic substitution but benzene does not without the aid of a catalyst?
Identify the dehydration product or products of a) ethanol, b) button-2-ol
Write down the equation for the Gibbs Free Energy change of a reaction. Hence explain why, for a spontaneous endothermic reaction, there must be an increase in the total entropy.
In terms of reaction mechanisms, what exactly is the rate-determining step?