Experiments for 'P'
Below follows a summary of all experiments, matching your search. Click one of the EXPERIMENT hyperlinks for a complete description of the experiment.
Results for 'P':
EXPERIMENT 1
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Vanadyl forms a light blue or white compound with phosphates, when it is
precipitated.
In excess alkali, this dissolves, forming a greenish brown clear liquid.
This color is like the familiar brown color of strongly alkaline solutions,
containing vanadium in the +4 oxidation state, but a little bit less reddish
and more greenish.
EXPERIMENT 2
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Copper (II) does not form a coordination complex with phosphates and/or
phosphoric acid.
EXPERIMENT 3
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Molybdates and phosphates produce a yellow complex in an anion, containing
both molybdenum and phosphorus. This complex is slowly reduced by sulfite.
EXPERIMENT 4
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Ammonium molybdate forms a yellow coordination complex with phosphates in
acidic environments, which precipitates. Oxidizing compounds do not
dissolve this precipitate, alkaline compounds do dissolve this precipitate.
EXPERIMENT 5
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Molybdates and orthophosphates give a yellow complex, which is reduced more
easily than molybdates alone.
EXPERIMENT 6
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Phosphates and molybdates are supposed to form a yellow complex. Other
experiments confirm this reaction, but this experiment does not show
such behavior. May be longer heating is required or an excess amount of
a strong acid is required?
EXPERIMENT 7
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When phosphoric acid is mixed with water, then some heat is produced, but
this is much less than the heat, produced on mixing water with sulphuric
acid.
EXPERIMENT 8
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Phosphoric acid is not capable of driving off hydrogen bromide from
alkali bromides, nor does it oxidize bromide.
EXPERIMENT 9
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In concentrated phosphoric acid, manganese (II) ions are oxidized easily to
manganese (III) ions, which are stabilized by formation of a phosphato-complex
with a remarkably bright purple color. This reaction is remarkable in the sense
that oxidation stops at manganese (III).
EXPERIMENT 10
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Iron (III) builds a coordination complex with phosphates.
EXPERIMENT 11
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Ferric ions form a colorless complex with phosphate ions in acidic
environments. In the presence of chloride ions, a yellow coordination
complex is formed, which can exist, even in the presence of phosphate.
EXPERIMENT 12
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Niobium pentachloride does react with methanol, but not nearly as violently as
phosphorus pentachloride.
EXPERIMENT 13
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Sodium hypophosphite is remarkably flammable. A mix with potassium chlorate is
dangerously explosive and can easily be ignited.
EXPERIMENT 14
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Vanadium pentoxide does not seem to react with red phosphorus.
EXPERIMENT 15
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Copper(II) can be reduced to the very peculiar compound CuH by hypophosphorous
acid, but only under very specific conditions. The compound CuH is quite
unstable and easily looses hydrogen.
In the presence of chloride ions, no CuH is formed, but CuCl is formed instead.
EXPERIMENT 16
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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.
EXPERIMENT 17
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Hexavalent chromium is reduced to trivalent chromium by hypophosphite, but
there is no further reduction to chromium(II).
EXPERIMENT 18
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Silver chlorite is stable, but only light heating is required for its
decomposition.
EXPERIMENT 19
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Red phosphorus dissolves in concentrated sulphuric acid, when it is strongly
heated.
EXPERIMENT 20
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Potassium bromate reacts with aluminium powder with a very bright light and
with crackling noise, but the mix is not like flash powder. Some sulphur is
needed for easy ignition of the mix.
When a tiny amount of red phosphorus is added to the mix, then it is ignited
even more easily, but then it also burns exceptionally fast, almost
explosively.
EXPERIMENT 21
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A mix of finely powdered sodium hypophosphite and potassium bromate forms an
energetic mix which can easily be ignited.
EXPERIMENT 22
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Vanadium(V) in acidic solution is reduced by hypophosphite to vanadium(IV), but
there is no further reduction to a lower oxidation state.
EXPERIMENT 23
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When phosphorus pentachloride is added to chromium trioxide, then a fairly
vigorous reaction occurs and exchange of oxygen and chlorine atoms occurs. The
two solids react with each other, forming liquid CrO2Cl2 and liquid POCl3.
EXPERIMENT 24
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Powdered magnesium and powdered red phosphorus react violently, when heated
sufficiently. The reaction product contains considerable amounts of magnesium
phosphide.
EXPERIMENT 25
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Sodium hypophosphite does not react with 68% nitric acid when mixed in the
cold. When the mix is heated somewhat, then the reaction suddenly sets off and
is self-sustained.
EXPERIMENT 26
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White phosphorus reacts with hot solutions of sodium hydroxide and gaseous
phosphine and diphosphine are produced. The diphosphine spontaneously combusts
in air, the phosphine does not. The diphosphine is very unstable and within a
few minutes it reacts and only phosphine is left.
REMARK: THIS IS A VERY DANGEROUS EXPERIMENT. WHEN NOT CARRIED OUT WITH
SUFFICIENT PRECAUTIONS. KNOW WHAT YOU ARE DOING!!
EXPERIMENT 27
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A mix of potassium perchlorate and sulphur cannot easily be ignited. When just
a tiny pinch of red phosphorus is mixed in, then the mix is ignited very easily
and it burns very fast with a bright flash.
EXPERIMENT 28
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This is a spectacular experiment. A mix of sodium chlorite and red phosphorus
can be ignited by bringing it in contact with hydrochloric acid.
End of results for 'P'