6 Answers
-
The phosphate ion, PO4, has a -3 charge, so for divalent
cobalt, or Co(II), the formula is: Co3(PO4)2
Hope this answers your question.
-
Cobalt Ii Phosphate
-
Cobalt Phosphate
-
To do this follow the following steps;
1. find the element symbol in the question in this case cobalt is Co and phosphate is a polyatomic ion, (there is no way to know the empirical formula so you would need to look it up) in this case its PO4 with a -3 charge)
2. you would then criss cross the charges, and you know that Co has a charge of +2 because of the roman numbers.
3. when you criss cross the charges you would get;
Co3(PO4)2
-
Co2(PO4)3
-
Co3(PO4)2