Difference between revisions of "Copper(II) phosphate"
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[[File:Copper(II) phosphate dry.jpg|thumb|322x322px|Freshly ground copper(II) phosphate intended for use in blue paint]] | [[File:Copper(II) phosphate dry.jpg|thumb|322x322px|Freshly ground copper(II) phosphate intended for use in blue paint]] | ||
| − | '''Copper(II) phosphate''', or '''cupric phosphate''', is a chemical compound with the formula Cu<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>. It is a light blue powdery compound that is insoluble in water. | + | '''Copper(II) phosphate''', or '''cupric phosphate''', is a chemical compound with the formula '''Cu<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>'''. It is a light blue powdery compound that is insoluble in water. |
==Properties== | ==Properties== | ||
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*Copper compounds collection | *Copper compounds collection | ||
*Paint pigments | *Paint pigments | ||
| − | *Copper (II) phosphate can be reduced to copper phosphide, which can be used to isolate phosphorous by heating it: | + | *Copper (II) phosphate can be reduced to copper phosphide, which can be used to isolate phosphorous by heating it: 4 Cu<sub>3</sub>P<sub>2</sub> → 4 Cu<sub>3</sub>P + P<sub>4</sub> |
==Handling== | ==Handling== | ||
Revision as of 18:58, 15 February 2016
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_phosphate_dry.jpg)
Copper(II) phosphate, or cupric phosphate, is a chemical compound with the formula Cu3(PO4)2. It is a light blue powdery compound that is insoluble in water.
Contents
Properties
Chemical
Copper(II) phosphate will react with acids to produce the corresponding copper salt and phosphoric acid.
Physical
Copper(II) phosphate is a light blue, powdery substance that is insoluble in water and ethanol, but soluble in ammonia and mineral acids.
Availability
Copper(II) phosphate is usually unavailable for sale as it has very few applications. It is extremely easy to prepare with OTC chemicals.
Preparation
Copper(II) phosphate can be prepared by combining copper(II) sulfate and trisodium phosphate in a 3:2 molar ratio.
- 3 CuSO4 (aq) + 2 Na3PO4 (aq) → 2 Cu3(PO4)2 (s) + 3 Na2SO4 (aq)
A different preparation involves reacting copper carbonate with phosphoric acid:
- 3 Cu2CO3(OH)2 + 4 H3PO4 → 2 Cu3(PO4)2 + 3 CO2 + 9 H2O
Monoammonium phosphate also works for this preparation.
Projects
- Copper compounds collection
- Paint pigments
- Copper (II) phosphate can be reduced to copper phosphide, which can be used to isolate phosphorous by heating it: 4 Cu3P2 → 4 Cu3P + P4
Handling
Safety
Like all copper compounds, copper(II) phosphate is mildly toxic, but since it is insoluble it is less of a concern than soluble compounds.[1]
Storage
Copper(II) phosphate should be stored in closed bottles.
Disposal
Copper phosphate should be disposed just like any other copper compound.
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