Question

what polyatomic ions have a 3 - charge?
check all that apply.
hydroxide
hydrogen phosphate
dichromate
acetate
sulfate
phosphate

Explanation:

• Hydroxide (\(OH^-\)) has a charge of \(1-\).
• Hydrogen phosphate (\(HPO_4^{2 -}\)) has a charge of \(2-\).
• Dichromate (\(Cr_2O_7^{2 -}\)) has a charge of \(2-\).
• Acetate (\(CH_3COO^-\)) has a charge of \(1-\).
• Sulfate (\(SO_4^{2 -}\)) has a charge of \(2-\).
• Phosphate (\(PO_4^{3 -}\)) has a charge of \(3-\).

Answer:

phosphate