This organic chemistry video tutorial provides the reaction mechanism of the tollens test which is useful for identifying aldehydes and alpha hydroxy ketones. The tollen's reagent consist of Ag+ or silver (I) cation complex in ammonia (NH3) under basic conditions with OH-. This video also provides the lucas reagent mechanism in the conversion of alcohol into an alkyl chloride using ZnCl2 and HCl. The lucas test helps you to classify primary, secondary and tertiary alcohols. Tertiary alcohols react fastest with the lucas reagent due to the stability of the tertiary carbocation intermediate. The chromic acid test helps to identify a primary or secondary alcohol but does not give a positive test for a tertiary alcohol. The chromic acid test consist of H2CrO4 which converts primary alcohols into carboxylic acids and secondary alcohols into ketones. Cr+6 changes from yellow orange to green blue to indicate a positive tets. The tollens is used in the silver mirror test / experiment using silver and glucose.
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