# What is the name of Ni(ClO_3)_2?

Dec 19, 2015

Nickel(II) chlorate.

#### Explanation:

You're dealing with an ionic compound, which means that you can break it down into cation, or positively charged ion, and anion, or negatively charged ion.

Right from the start, the $2$ subscript used for the anion tells you that the charge of the nickel ion is equal to $2 +$. This of course implies that you're dealing with nickel in its $+ 2$ oxidation state.

Since nickel is a transition metal that can exhibit multiple oxidation states, you're going to have to use Roman numerals to name this ionic compound.

Now focus on the anion, ${\text{ClO}}_{3}^{-}$. The anion has a $1 -$ charge, which is why you need two of them to balance the $2 +$ charge of the cation.

The ${\text{ClO}}_{3}^{-}$ anion is called chlorate, or chlorate anion, and it features chlorine in its $5 +$ oxidation state.

This means that the ionic compound will be called - remember that the cation is added first

nickel(II) chlorate

Here the Roman numeral (II) symbolizes the oxidation state of the transition metal cation.