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Green
It is soluble in water so a green solution is formed.
Not as a coin, it's called an alloy when it is a solid.
nickel (ll) sulfate heptahydrate
It is made of copper and nickel. A 1949 NICKEL is made from copper & nickel.
Nickel cannot replace copper in copper II sulfate because nickel is higher in the electromotive series than copper.
Green
Okay, let's take the basics: There is no such thing as "copper sulfate baking powder", as it would be poisonous. I can think of no way to relate elemental nickel to the fictitious "copper sulfate baking powder".
Mercury, Iron or Nickel will not replace copper in a reaction between copper II sulfate and the metals because the metals are below copper in the reactivity level of the periodic table.
NiS nickel sulfide
The result is a clear blue liquid that reflectes light off it. I don't much about it and I'm looking on the internet to get a better understanding of it. But, it was during a school experiment and this is what me and my partner discovered.
It is soluble in water so a green solution is formed.
Not as a coin, it's called an alloy when it is a solid.
Nickel sulfate is an ionic compound though it has covalent bonds within the sulfate ion itself.
nickel (ll) sulfate heptahydrate
Stannous sulphate: SnSO4 Nickel sulphate: NiSO4.6H2O
It is made of copper and nickel. A 1949 NICKEL is made from copper & nickel.