How do you find the formula for copper 2 phosphate?

Answer 1

You could try looking up "copper II phosphate" on Google. Or you could work it out with a little knowledge of elementary chemistry. Or you could ask here, and someone might be kind enough to tell you.

Luckily for you, I'm in a kind mood today. It's Cu3(PO4)2.

(And I just checked, and the very first hit from Google tells you the same thing. One danger with Google is that there are a lot of idiots with webpages, but in this case whoever wrote the page knew some chemistry.)

Answer 2

To find the formula for copper(II) phosphate, you would first determine the charges of the elements involved. Copper typically forms a 2+ charge (Cu2+), and phosphate is a polyatomic ion with a 3- charge (PO4^3-). To balance the charges, you would need two phosphate ions for every copper ion, resulting in the formula Cu3(PO4)2.