Copper (I) chloride
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| Chemical formula | {{#Chem:CuCl}} |
|---|---|
| OTP appearance | white crystal |
| Molar Mass(g/mol) | 98.999 |
| Density(g/cc) | 4.14 |
| Melting Point(°C) | 423 |
| Boiling Point(°C) | 1490(decomp) |
| Solubility in water(g/L) | 0.047 |
| NFPA 704 |  0
3
0
|
Uses
Justification Questioned
Natural occurrence
Hazards
Production
Synthesis
from copper (II) chloride
sulfuric acid process
- Bubbling sulfur dioxide through an aqueous solution of copper (II) chloride produces copper (I) chloride, sulfuric acid and hydrochloric acid.
- {{#Chem:2 CuCl2(aq) + SO2(g) + 2 H2O → 2 CuCl + H2SO4 + 2 HCl}}
sodium sulfite
Dissolve 5 g {{#Chem:CuCl2▪2H2O}} in 5 mL of water. Dissolve 3.5 g {{#Chem: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
- {{#Chem: 2CuCl { = 100°C } 2CuCl + 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.