Multiple Choice
Which of the following is a polyatomic ion?
45
views
3. Chemical Reactions
Polyatomic Ions
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following is the correct chemical formula for the acetate ion?
A
CO3^{2-}
B
SO4^{2-}
C
NO3-
D
C2H3O2-
Verified step by step guidance1
Understand that the acetate ion is a common polyatomic ion derived from acetic acid (CH3COOH) by losing a hydrogen ion (H+).
Recall that the acetate ion contains two carbon atoms, three hydrogen atoms, and two oxygen atoms, with an overall charge of -1.
Compare the given options: CO3^{2-} is carbonate ion, SO4^{2-} is sulfate ion, NO3^- is nitrate ion; none of these match the composition of acetate.
Recognize that the correct chemical formula for the acetate ion is C2H3O2^- (sometimes written as CH3COO^-), reflecting its structure and charge.
Therefore, identify C2H3O2^- as the correct formula for the acetate ion based on its atomic composition and charge.
Related Videos
Related Practice
Polyatomic Ions practice set
Problem sets built by lead tutorsExpert video explanations