Description of experiment
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Needed compounds:
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aluminum : Al
phosphorus red : P
potassium hexa nitrito cobaltate (III) : K3 [Co(NO2)6] . H2O
Class:
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elem=N,Al,P,Co
redox
Summary:
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The yellow pigment aureolin, also known as cobalt yellow, and having the
chemical name potassium hexanitrito cobaltate(III), can be used as a mild
oxidizer which gives a very smoothly and evenly burning mix with red
phosphorus. When also aluminium powder is added to the mix, then the reaction
is more violent and sparks are sprayed around.
Description:
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Mix some finely powdered aureolin with some finely powdered red phosphorus.
Ignite the mix: The mix is easily ignited and burns very fast with a remarkably
smooth orange flame and no noise at all.
Mix some finely powdered aureolin, some finely powdered red phosphorus and some
400 mesh aluminium powder and ignite the mix: This mix also is easily ignited
and now the burning is more violent. Sparks are sprayed around and some hissing
noise is produced when the mix burns.
Be careful: Do not inhale the smoke from this mix, it contains cobalt and this
is toxic and probably a carcinogen.