Multiple Choice
Which of the following best represents the formula unit for an ionic compound formed between fluorine and hydrogen?
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3. Chemical Reactions
Naming Ionic Compounds
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Which of the following is the correct chemical formula for ammonium sulfite?
A
(NH_4)_2SO_4
B
NH_4SO_3
C
NH_4_2SO_3
D
(NH_4)_2SO_3
Verified step by step guidance1
Identify the ions involved: ammonium is the polyatomic ion NH_4^+ and sulfite is the polyatomic ion SO_3^{2-}.
Determine the charges on each ion: ammonium (NH_4^+) has a charge of +1, and sulfite (SO_3^{2-}) has a charge of -2.
Balance the total positive and negative charges to form a neutral compound. Since sulfite has a charge of -2, you need two ammonium ions (each +1) to balance it.
Write the formula by placing the ammonium ion in parentheses with a subscript 2 to indicate two ammonium ions, followed by the sulfite ion: (NH_4)_2SO_3.
Verify that the formula is electrically neutral by confirming that the total positive charge (+2 from two NH_4^+) balances the total negative charge (-2 from SO_3^{2-}).
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