Description of experiment
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Needed compounds:
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hydrogen peroxide : H2O2
hydroquinone : HO C6H4 OH
Class:
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elem=C
redox
Summary:
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Hydroquinone is oxidized by hydrogen peroxide. This reaction is slow
in a neutral environment.
Description:
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Add a 3% solution of H2O2 to a solution of hydroquinone: The solution at
first remains colorless, but slowly the liquid turns pink (not a very bright
pink color, but a little brownish, 'dirty' pink). After 10 minutes at appr.
15 C the liquid is clear brownish-pink.
Add a drop of 3% H2O2 to solid hydroquinone: The liquid around the needles
of hydroquinone turns brown. When water is added, the brown liquid mixes
with the water and a clear brownish-pink liquid is formed.