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Multiple Choice
What is the correct name for the ionic compound Al(NO3)3?
A
Aluminum nitrite
B
Aluminum trinitrate
C
Aluminum(III) nitrate
D
Aluminum nitrate
Verified step by step guidance
1
Identify the cation and anion in the compound Al(NO3)3. The cation is Al, which is aluminum, and the anion is NO3, which is nitrate.
Determine the charge on the aluminum ion. Aluminum typically forms a +3 charge, so it is Al^{3+}.
Recognize that nitrate is a polyatomic ion with the formula NO3^{-} and a charge of -1.
Since the formula is Al(NO3)3, it means one aluminum ion is combined with three nitrate ions to balance the charges (3+ from Al and 3 × -1 from nitrate).
Name the compound by stating the cation name followed by the anion name. Because aluminum has a fixed charge of +3, no Roman numeral is needed, so the correct name is Aluminum nitrate.