Question

match the following polyatomic ions to their names
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po₄³⁻ = bicarbonate
so₄²⁻ = sulfide
co₃²⁻ = carbonate
hco₃⁻ = phosphite
= sulfite
= phosphate
= sulfate

Explanation:

To solve this, we recall the names of common polyatomic ions:

• $\boldsymbol{PO_4^{3-}}$ is phosphate (not phosphite, which is $PO_3^{3-}$).
• $\boldsymbol{SO_4^{2-}}$ is sulfate (sulfite is $SO_3^{2-}$, sulfide is $S^{2-}$).
• $\boldsymbol{CO_3^{2-}}$ is carbonate.
• $\boldsymbol{HCO_3^-}$ is bicarbonate (or hydrogen carbonate).

Answer:

• $PO_4^{3-}$ = phosphate
• $SO_4^{2-}$ = sulfate
• $CO_3^{2-}$ = carbonate
• $HCO_3^-$ = bicarbonate