The charge of Ca2+ is correct. Calcium typically oxidizes to form a 2+ cation by losing two electrons.
PO4^-3 is an ion.So its valency is -3
The chemical formula for magnesium phosphate is Mg3(PO4)2. This mineral is very important and keeps the human body working properly.
The correct formula for cooper(II) phosphate is Cu3(PO4)2.
The chemical formula of barium phosphate is Ba3(PO4)2.
The phosphate ion is (PO4)3-. Hence, Calcium phosphate is Ca3(PO4)2 as the Calcium ion is Ca2+)
The correct equilibrium expression for the dissolution of calcium phosphate, Ca3(PO4)2, in water is Ksp = [Ca2+]^3[PO43-]^2, where [Ca2+] represents the concentration of calcium ions and [PO43-] represents the concentration of phosphate ions in solution.
For example a calcium phosphate as Ca3(PO4)2.
Calcium phosphate = Ca2+ PO4-3 = Ca3(PO4)2
The correct chemical formula for calcium phosphate is Ca3(PO4)2.
Mo3(PO4)4
The ionic compound for Ca3(PO4)2 is calcium phosphate. It consists of calcium ions (Ca2+) and phosphate ions (PO43-) in a 3:2 ratio.
The correct name for S3(PO4)2 is trisodium diphosphate.
The correct name for Sr3(PO4)2 is strontium phosphate.
The correct ionic formula for Ca2+ and P3- is Ca3P2. The charges on each ion must balance to create a neutral compound, so two Ca2+ ions (2x2 charges) are needed to balance out the three P3- ions (3x(-3) charges).
Calcium phosphate is Ca3(PO4)2. It is a combination of the Ca2+ ion with the PO43- ion.
I believe that what you have in mind is the phosphate radical, PO4. While this radical appears in many compounds, it is not itself a compound.