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NiCl2 is nickel chloride
nickel (ii) carbonate
NiCO3
the formula is NiCl2
NiCl26H2O
(Ni)2CaCO3
Nickel II carbonate
The formula is NiCl2.6 H2O.
NiCl2
With the 2 oxidation state. NiCO3
Nickel (II) oxalate dihydrate; used in battery production.
Prepare a solution of a nickel salt such as sulfate, nitrate, chloride, etc. This can be done by dissolving pieces of nickel in a strong acid mixture. Once you have the nickel salt, neutralize the solution and add excess baking soda. Then filter out the fine light green nickel carbonate.