Question

what is the name of this ion? $\ce{c_{2}h_{3}o^{-}_{2}}$
options: hydronium, acetate, bicarbonate, cyanide

Explanation:

To determine the ion's name, we analyze each option:

• Hydronium has the formula $\ce{H3O+}$, not $\ce{C2H3O2-}$.
• Acetate ion has the formula $\ce{C2H3O2-}$ (or $\ce{CH3COO-}$).
• Bicarbonate is $\ce{HCO3-}$, not matching.
• Cyanide is $\ce{CN-}$, not matching.

So the correct ion name for $\ce{C2H3O2-}$ is acetate.

Answer:

B. acetate