What is tollen reagent
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Posted by N K 7 years, 11 months ago
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Gurvinder Kaur 7 years, 11 months ago
Tollens' reagent is freshly prepared ammonical silver nitrate solution. Aldehydes react with tollens' reagent and a bright silver mirror is formed due to the formation of silver metal. The aldehydes will get oxidised to carboxylate anion. This reaction occurs in alkaline medium. Ketones will not give silver mirror test. The reaction is :
RCHO + 2[Ag (NH3)2]+ + 3OH- → RCOO- + 2Ag + 2H2O + 4NH3
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