Nickel(II) sulfate hexahydrate (NiSO4•6H2O)-Crystalline introduce:
Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO4(H2O)6. This highly soluble blue green coloured salt is a common source of the Ni2+ ion for electroplating.
Molar mass:154.75 g/mol (anhydrous);262.85 g/mol (hexahydrate);280.86 g/mol (heptahydrate)
Appearance:yellow solid (anhydrous);blue crystals (hexahydrate);green-blue crystals (heptahydrate)
Density:4.01 g/cm3 (anhydrous);2.07 g/cm3 (hexahydrate);1.948 g/cm3 (heptahydrate)
Melting point:> 100 °C (anhydrous);53 °C (hexahydrate)
Boiling point:840 °C (1,540 °F; 1,110 K) (anhydrous, decomposes)
100 °C (hexahydrate, decomposes)
Solubility in water:65 g/100 mL (20 °C);77.5 g/100 mL (30 °C) (heptahydrate)
Solubility:anhydrous:insoluble in ethanol, ether, acetone；hexahydrate:insoluble in ethanol, ammonia；heptahydrate:soluble in alcohol
Acidity (pKa):4.5 (hexahydrate)
Magnetic susceptibility (χ):+4005.0·10−6 cm3/mol
Refractive index (nD):1.511 (hexahydrate);1.467 (heptahydrate)
Crystal structure:cubic (anhydrous);tetragonal (hexahydrate);rhombohedral (hexahydrate)
It is the precursor material for Ni electroplating. It is applied in biochemistry and also employed as a calibrant for magnetic susceptibility measurements.
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