The boiling point of nickel sulfate should be around 840 °C, where thermal decomposition has already begun.
2, 647.4 degrees Fahrenheit
Stannous sulphate: SnSO4 Nickel sulphate: NiSO4.6H2O
Zinc sulfate is an ionic compound (Zn2+ and SO42-) while naphtalene is not (it is a hydrocarbonic compound)
Nickel cannot replace copper in copper II sulfate because nickel is higher in the electromotive series than copper.
Ni2S3
The formula for nickel II sulfate tetrahydrate is NiSO4 * 4H2O.
the boiling point for nickel is 2732 C or 3186 K.
Nickel's boiling point is 2732.0 °C (3005.15 K).
Copper II sulfate solution has a boiling point of 150 degrees Celsius. CuSO4 crystals melt at 200 degrees Celsius however I'm unable to find data on its boiling point.
Magnesium sulfate is thermally decomposed by heating.
1100 degrees celsius
103.6
103.6ºC
103.6ºC
Lead(II) sulfate melts at over a 10000C. I can't find a boiling point and I am not surprised- I would expect decomposition at such temperatures.
The boiling point of magnesium is at 1 090 0C.
Magnesium sulfate has a high melting and boiling point, as it is made of Ionic bonds which are very strong. A lot of energy is needed to break them. So ionic compounds have high melting and boiling points. See related link for more information.
Nickel sulfate is an ionic compound though it has covalent bonds within the sulfate ion itself.