Copper (I) chloride

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Copper (I) chloride
aka cuprous chloride
Chemical formula CuCl
OTP appearance white crystal 
Molar Mass(g/mol) 98.999 
Melting Point(°C) 423 
Boiling Point(°C) 1490(decomp) 
Density(g/cc) 4.14 
Solubility in water(g/L) 0.047
NFPA 704
NFPA704.png
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Uses

Justification Questioned

Natural occurrence

Hazards

Production

Synthesis

from copper (II) chloride

sulfuric acid process
2 CuCl2(aq) + SO2(g) + 2 H2O 2 CuCl + H2SO4 + 2 HCl
sodium sulfite
Dissolve 5 g CuCl2▪2 H2O in 5 mL of water. Dissolve 3.5 g Na2SO3 in 25 mL of water. Make up a dilute sulfurous acid solution by dissolving 1 g of sodium sulfite (Na2SO3) and 2 mL of concentrated HCl in 1 L of water. Add the copper (II) chloride solution to the sodium sulfite solution while stirring. The solution is initially colored, but as the reduction proceeds, changes to a colorless copper(I) chloride that will precipitate.
thermal decomposition
  • At approximately 1000°C, copper (II) chloride decomposes
    2 CuCl
    {
    100°C}
    2 CuCl + Cl2

Testing

Purification

Both ammonium chloride and copper (II) chloride are readily soluble in water, while copper (I) chloride is not. Washing with water, therefore, would remove those two components.

Storage

Disposal

See Also

References