Multiple Choice
What is the name of the polyatomic ion with the formula ClO_2^-?
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3. Chemical Reactions
Polyatomic Ions
Multiple Choice
What is the name of the polyatomic ion with the formula C2H3O2−?
A
Acetate
B
Carbonate
C
Formate
D
Oxalate
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Verified step by step guidance1
Identify the given polyatomic ion formula: C2H3O2⁻.
Recall common polyatomic ions and their formulas, focusing on those containing carbon, hydrogen, and oxygen.
Recognize that C2H3O2⁻ corresponds to the acetate ion, which is derived from acetic acid (CH3COOH) by losing a proton (H⁺).
Differentiate acetate from other options: carbonate (CO3²⁻), formate (HCOO⁻), and oxalate (C2O4²⁻) based on their distinct formulas and charges.
Conclude that the correct name for C2H3O2⁻ is acetate.
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