What is the correct name for #Sn_3(PO_4)_2#?
The important thing to realize here is that you're dealing with an ionic compound that contains tin,
As you know, transition metals can exhibit multiple oxidation states, which implies that you're going to have to use a Roman numeral to indicate the oxidation state of the transition metal in this compound.
So, ionic formulas are written based on the criss cross rule. which states that the charge on the cation becomes the subscript of the anion, and vice versa.
In this case, you have
#"Sn"_color(red)(3)("PO"_4)_color(blue)(2) <=> "Sn"^color(blue)(2+)"PO"_4^color(red)(3-)#
Keep in mind that since the charges must be balanced, you can say that a formula unit of this compound will contain
- a total of three
- a total of two
So, the tin cation is in its
Put all this together to get the name of the compound
#"Sn"_3("PO"_4)_2 ->#tin(II) phosphate