Basic copper carbonate

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Basic copper carbonate
Chemical formula Cu2(OH)2CO3
OTP appearance aqua/green solid 
Molar Mass(g/mol) 221.114 
Melting Point(°C) 200 
Boiling Point(°C) 290 (decomp) 
Density(g/cc)
Enthalpy of Formation(kJ/mol) -595 
Solubility in water(g/L) insoluble
NFPA 704
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Uses

Primary

Secondary

  • Part of early paths to sulfuric acid

Natural occurrence

Hazards

Production

Extraction

Grind malachite or azurite into a fine powder and pan. (separate by mass)

Synthesis

Combine copper sulfate and sodium bicarbonate in water giving copper carbonate, which can be filtered from the solution

2 CuSO4 + 2 NaHCO3 + H2O Cu2(OH)2CO3 + 2 NaHSO4 + CO2 // bicarbonates
2 CuSO4 + 2 NaCO3 + H2O Cu2(OH)2CO3 + 2 NaSO4 + CO2 // carbonates

Testing

Purification

  • Wash with cold water, ethanol, acetone, benzene, dichloromethane, etc. Basic copper carbonate is insoluble in all of them.

Storage

  • Storable in open container

Disposal

  • Can be released into non-watery environment

See Also

References