2. Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name.
• KI
• Fe2O3
• (NH4)3PO4

Question

2.	Given the chemical formulas of the following compounds, name each compound and state the rules you used to determine each name.
•	KI
•	Fe2O3
•	(NH4)3PO4

aaronq · Answer

I'll tell you the rules, you name them, okay?

KI is an ionic compound, the cation goes first, then the anion (a suffix "-ide" is added to the anion.

$Fe_2O_3$ is also ionic (an "ox$\sf\color{red}{ ide}$), it also has a transition metal. Since those can be several oxidation states (you determine this by balancing the charges), you state the oxidation state in roman numerals. e.g. Chromium(IV)whatever

$(NH_4)_3PO_4$ uses two polyatomic ions. Simply state both names. The positive ion goes first and you add a suffix "-ium", the anion goes second, no suffix needed.

anonymous · Answer

KI- Potassium Iodide
Fe2O3-  Iron (III) oxide
(NH4)3PO4- I don't know that one

aaronq · Answer

they're good.  ammonium phosphate