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Technical data


Schiff's test and Fehling's test

Article no: P7172400
Principle

These and other reactions which differentiate aldehydes from ketones (silver mirror) result from the oxidizability of the aldehydes, due to the presence of an additional hydrogen on the carbon atom.

Knowledge of the oxidizing potential of the Fehling's solution is necessary to answer question 3, so that this topic has to be discussed prior if the students are not familiar with it.

Learning objectives

  • Aldehydes can be distinguished from ketones by their reaction with fuchsin-sulphurous acid solution (Schiff's solution) and with Fehling's solution.
  • The reactions of both solutions results from the oxidizability of aldehydes. Ketones cannot be oxidized.

Benefits

  • Easy teaching and efficient learning by using interactive experimentation PHYWE-Software
  • Experiment is part of a complete solution set with experiments for the topic Organic Chemistry matched with international curriculum: all topics are covered

 

Scope of delivery

Test tube, laboratory glass, various lengths, 100 pcs. 37658-10 1
Test tube brush w. wool tip,d20mm 38762-00 1
Test tube rack, wood, for 6 tubes d= 22mm MAU-20042200 1
Test tube holder, up to d 22mm 38823-00 1
Laboratory pen, waterproof, black 38711-00 1
Protecting glasses, clear glass 39316-00 1
Pipette with rubber bulb 64701-00 4
Acetone, extra pure, 1000 ml 30004-70 1
Fehling's solution I 250 ml 30079-25 1
Fehling's solution II 250 ml 30080-25 1
Butane burner with cartridge, 220 g 32180-00 1
Schiff's reagent 250 ml 31827-25 1

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