Description of experiment
Below follows a plain text transcript of the selected experiment.
Needed compounds:
-----------------
ascorbic acid : C6H8O6
cupric chloride dihydrate : CuCl2 . 2H2O
Class:
------
elem=Cu
redox
Summary:
--------
Reduction of tetrachlorocuprate with ascorbic acid
Description:
------------
Slightly acid copper(II) chloride, produced by evaporation of an hydrochloric
acid-copper(II) chloride mixture, is dissolved in water. This forms the bright
green tetrachlorocuprate ion in solution. When ascorbic acid is added, a white
precipitate forms and the solution becomes colorless. This white precipitate is
copper(I) chloride. This shows that the copper(II) ion can be reduced by
ascorbic acid in both acidic, neutral, and basic solutions.