Nickel(II) sulfate
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| Nickel(II) Sulfate | |
|---|---|
| [[Image:|200px|Nickel(II) chloride hexahydrate]] | |
| General | |
| Systematic name | Nickel(II) Sulfate, hydrate |
| Molecular formula | NiSO4(H2O)6 |
| Molar mass g/mol | 262.85 g/mol (hexahydrate) |
| Appearance | blue crystals (hexahydrate) |
| CAS number | [10101-97-0] (hexahydrate) |
| EINECS number | * |
| Properties | |
| Density and phase | 2.07 g/cm3 (hexahydrate) |
| Solubility in water | highly soluble |
| Solubility in ethanol | sparingly (hexahydrate) |
| Melting point | * °C hydrate loses water |
| Structure | |
| Coordination geometry |
octahedral at Ni |
| Crystal structure | Monoclinic? |
| Thermodynamic data | |
| Standard enthalpy of formation ΔfH°solid |
* kJ/mol (anhyd form) |
| Standard molar entropy S°solid |
* J.K−1.mol−1 for the hexahydrate? |
| Safety data | |
| EU classification | not listed |
| Safety statements | 22-36/37-60-61 |
| Risk statements | 22-40-42/43-50/53 |
| RTECS number | QR9600000 |
| Supplementary data page | |
| Thermodynamic data |
Phase behaviour Solid |
| Spectral data | UV |
| Related compounds | |
| Other anions | Nickel(II) bromide Nickel(II) chloride |
| Other cations | Copper(II) sulfate Cobalt(II) sulfate |
| Related compounds | |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
|
Nickel(II) sulfate or just nickel sulfate, is the chemical compound NiSO4. It is a high melting, paramagnetic solid. The term nickel sulphate often also refers to the blue hexahydrate NiSO4(H2O)6, which is commonly found in the laboratory. Like all nickel salts, this compound is carcinogenic.
Contents |
[edit] Production and syntheses
Dissolution of nickel hydroxide in dilute sulfuric acid followed by evaporation will afford crystals of this salt
[edit] Structure and properties
The heptahydrate NiSO4(H2O)7 consists of [Ni(H2O)6]2+ ions hydrogen bonded to sulfate.[1] In solution, [Ni(H2O)6]2+ probably persists.
[edit] Coordination chemistry
NiSO4(H2O)6 and related hydrates react with ammonia to give [Ni(NH3)6]SO4 and with ethylenediamine to give [Ni(H2NCH2CH2NH2)3]SO4. The latter is occasionally used as a calibrant for magnetic susceptibility measurements.
[edit] Applications
NiSO4(H2O)6 is used with Boric Acid in some electroplating baths. It is also used in conjunction with nickel(II) chloride in electroplating baths.
[edit] References
- ^ Wells, A.F. (1984). Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
