Multiple Choice
Which category does the ion PO4^{3-} belong to?
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3. Chemical Reactions
Polyatomic Ions
Multiple Choice
Which of the following is the correct name for the polyatomic ion SO_3^{2-}?
A
Sulfite
B
Thiosulfate
C
Sulfoxide
D
Sulfate
Verified step by step guidance1
Identify the chemical formula of the polyatomic ion given: \(\mathrm{SO_3^{2-}}\).
Recall the common naming conventions for sulfur-oxygen polyatomic ions: ions with three oxygens and a 2- charge are typically either sulfite or sulfate.
Understand that 'sulfate' corresponds to \(\mathrm{SO_4^{2-}}\) (with four oxygens), while 'sulfite' corresponds to \(\mathrm{SO_3^{2-}}\) (with three oxygens).
Recognize that 'thiosulfate' contains sulfur and oxygen but has a different formula (\(\mathrm{S_2O_3^{2-}}\)), and 'sulfoxide' is not a polyatomic ion but a functional group in organic chemistry.
Conclude that the correct name for \(\mathrm{SO_3^{2-}}\) is 'sulfite' based on the number of oxygen atoms and charge.
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