Nickel(||)
It is Ni(II), not some strange ||. Roman numeral.
How do you know from the reaction that Nickel(||) carbonate is insoluable in water.
You don't. You know it from solubility rules.
I know its (II) I just didn't know what keys I needed to press.
Incorrect good sir on the second comment, it's something that happens in the reaction that tells you. Any help?
Nevermind, I found out the answer. PM if interested.