Description of experiment
Below follows a plain text transcript of the selected experiment.
Needed compounds:
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potassium permanganate : KMnO4
acetone : CH3 CO CH3
sodium hydroxide : NaOH
hydroxyl amine sulfate : (NH3OH)2 SO4
Class:
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elem=N
redox
organic
Summary:
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Hydroxyl amine reacts with acetone, releasing (some) heat. After this
reaction, the resulting compound is shown to still be a relatively strongly
reducing agent in alkaline solution.
Description:
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Add some water to a mixture of solid hydroxyl amine sulfate and NaOH: A gas
is evolved in the wet mixture of both solids.
Shake well: Both solids quickly dissolve and no more gas is evolved. The
temperature hardly has risen (a fairly large amount of water was used,
relative to the amount of the solids).
Add some acetone (excess amount) and shake: The liquid remains clear and
colorless. The liquid becomes noticeable warmer and a peculiar smell can
be observed, which definitely is not the smell of pure acetone. Apparently
a reaction occurs between hydroxyl amine and acetone.
Add a few crystals of KMnO4: The crystals dissolve and the liquid becomes
green when the crystals dissolve. The liquid, however, quickly turns brown
and turbid. The peculiar smell becomes stronger (or is another compound
formed with again another, but similar, smell?).