Would Ti3(PO4)2 be

titanium phosPHATE
or phosPHIDE

phosphate is correct. phosphide is for binary compounds only; i.e., HCl is hydrogen chloride, Mg3P2 is magnesium phosphide, HI is hydrogen iodide, Mg3N2 is magnesium nitride.

The phosphate ion is PO4^3-
The phosphite ion is PO3^3-
The phosphide ion is P^3-

So i only use IDE for binary compounds only?

right.

That's where you get sodium chloride for NaCl. Potassium bromide for KBr.

What would KOH be?

potassium hydroxide. The OH^- is the hydroxide ion.

To determine whether Ti3(PO4)2 is titanium phosphate or titanium phosphide, we need to understand the naming conventions for these compounds.

Titanium phosphate is a compound that consists of titanium cations (Ti2+) and phosphate anions (PO43-). The phosphate anion (PO43-) contains phosphorus and oxygen. The name "phosphate" is used to describe compounds containing the PO43- ion.

On the other hand, titanium phosphide is a compound that consists of titanium cations (Ti2+) and phosphide anions (P3-). The phosphide anion (P3-) consists of only phosphorus and has a -3 charge. The naming convention for compounds containing phosphide anions involves using the suffix "-ide" after the name of the element.

Now let's analyze Ti3(PO4)2 to determine which compound it is:

In Ti3(PO4)2, we have the titanium cation (Ti2+), which is a common charge for titanium. And we have the phosphate anion (PO43-), which consists of both phosphorus and oxygen.

Based on this information, we can conclude that Ti3(PO4)2 is titanium phosphate, as it contains both titanium cations (Ti2+) and phosphate anions (PO43-). The presence of oxygen in the phosphate anion indicates that it is indeed a phosphate compound rather than a phosphide compound.

Therefore, Ti3(PO4)2 is titanium phosphate.