Copper(II) hydroxide
Product Details
|
No |
Item |
Index |
|
1 |
Copper（Cu）% |
≥63.2 |
|
2 |
Cu(OH)2 % |
≥97.0 |
|
3 |
Plumbum（Pb) % |
≤0.005 |
|
4 |
Nickel(Ni)% |
≤0.005 |
|
5 |
Iron(Fe) % |
≤0.015 |
|
6 |
Chloride(cl-)% |
≤0.12 |
|
7 |
Insoluble matter in HCL % |
≤0.02 |
|
8 |
Stability |
Leave at 70°C for three hours non-discoloruing |
Characteristics
Copper hydroxide is a blue flocculent precipitate, insoluble in water, heat decomposition, slightly amphoteric, soluble in acid, ammonia and sodium cyanide, easily soluble in alkaline glycerol solution, heat to 60-80 ℃ to darken the temperature higher decomposition into black copper oxide and water.Properties
Molar mass 97.561g-mol-¹Appearance Blue solid or blue-green powder
Density 3.368 g/cm3 (solid)
Melting point 80 °C (decomposes to copper oxide)
Production
Copper(II) hydroxide can be produced by adding sodium hydroxide to various copper(II) sources. The nature of the resulting copper(II) hydroxide however is sensitive to detailed conditions. Some methods produce granular, robust copper(II) hydroxide while other methods produce a thermally sensitive colloid-like product.
Traditionally a solution of a soluble copper(II) salt, such as copper(II) sulfate (CuSO4·5H2O) is treated with base:
- 2NaOH + CuSO4·5H2O → Cu(OH)2 + 6H2O + Na2SO4
This form of copper hydroxide tends to convert to black copper(II) oxide:
- Cu(OH)2 → CuO + H2O