Multiple Choice
What is the correct name for the ionic compound with the formula ZnS?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for aluminum nitrate?
A
Al(NO2)3
B
Al2(NO3)3
C
Al3(NO3)2
D
Al(NO3)3
Verified step by step guidance1
Identify the ions involved: aluminum ion and nitrate ion. Aluminum typically forms a +3 charge ion, written as Al^{3+}.
Determine the charge of the nitrate ion, which is NO_3^{-} with a -1 charge.
To write the correct formula for aluminum nitrate, balance the total positive and negative charges so the compound is electrically neutral.
Since aluminum has a +3 charge and nitrate has a -1 charge, you need three nitrate ions to balance one aluminum ion, resulting in the formula Al(NO_3)_3.
Verify that the formula reflects the correct ratio of ions: one Al^{3+} ion combined with three NO_3^{-} ions, ensuring overall charge neutrality.
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