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19 December, 23:41

Provide the name of the oxyanion of the acid: H2CO3 (aq).

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  1. 20 December, 02:49
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    Carbonate

    Explanation:

    H₂CO₃ is an oxyacid, which is the general name for the acids that contain oxygen, i. e. the chemical formula for an oxyacid contains hydrogen, a nonmetal, and oxygen: HₐXₓOₙ.

    When an oxyacid ionizes it forms protons (H⁻) and oxyanions.

    When H₂CO₃ (aq) inonizes completely it does it according the equation:

    H₂CO₃ (aq) → 2 H⁺ (aq) + CO₃²⁻ (aq)

    Meaning that it inoizes into two H⁺ cations and one CO₃²⁻ anion. The latter is the oxyanion.

    Cations are positive ions. Anions are negative ions.

    The name of H₂CO₃ is carbonic acid. From that you must know that the name of the oxyanion CO₃²⁻ is carbonate: the root ic from the acid changes to ate in the anion.

    Summarizing:

    Acid formula: H₂CO₃ Acid name : Carbonic acid Oxyanion name : Carbonate Oxyanion formula : CO₃²⁻

    Additionally, you must know that when only one proton (instead of two) is released from the acid you form the ion HCO₃⁻ which is named bicarbonate or hydrogen carbonate.
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