Multiple Choice
Which of the following is the correct name for the ion N^{3-}?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct IUPAC name for the compound Al(NO3)3?
A
aluminum trinitrate
B
aluminum nitrate
C
aluminum nitrite
D
aluminum(III) nitrate
Verified step by step guidance1
Identify the cation and anion in the compound Al(NO3)3. Here, Al is the cation (aluminum ion) and NO3 is the nitrate anion.
Determine the charge on the aluminum ion. Aluminum typically forms a +3 charge, so it is Al³⁺.
Recognize the nitrate ion (NO3⁻) as a polyatomic ion with a -1 charge.
Since the formula is Al(NO3)3, three nitrate ions balance the +3 charge of one aluminum ion, so no Roman numeral is needed in the name because aluminum has only one common oxidation state (+3).
Use the correct naming convention: name the cation first (aluminum), followed by the name of the anion (nitrate). The prefix 'tri-' is not used for the anion in this case because it is a polyatomic ion and the number is indicated by the formula.
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