Multiple Choice
What is the name of the polyatomic ion with the formula PO_4^{3-}?
56
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 polyatomic ions has a positive charge?
A
Phosphate, PO_4^{3-}
B
Nitrate, NO_3^-
C
Ammonium, NH_4^+
D
Sulfate, SO_4^{2-}
Verified step by step guidance1
Review the charges on each polyatomic ion given in the problem: Phosphate (PO_4^{3-}), Nitrate (NO_3^-), Ammonium (NH_4^+), and Sulfate (SO_4^{2-}).
Recall that most common polyatomic ions carry a negative charge, which is indicated by the superscript minus signs (e.g., 3-, 2-, or 1-).
Identify the ion with a positive charge by looking for a superscript plus sign (+) in its formula.
Note that Ammonium (NH_4^+) is the only polyatomic ion listed with a positive charge, as indicated by the superscript plus sign.
Conclude that Ammonium is the polyatomic ion with a positive charge, while the others are negatively charged ions.
Related Videos
Related Practice
Polyatomic Ions practice set
Problem sets built by lead tutorsExpert video explanations