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18 October, 08:07

Write the equations that represent the first and second ionization steps for selenic acid (H2SeO4) in water. (Use H3O instead of H.) First ionization step: H2O (l) Second ionization step: H2O (l)

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  1. 18 October, 08:21
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    First ionization step:

    H₂SeO₄ (aq) + H₂O (l) → H₃O⁺ (aq) + HSeO₄⁻ (aq)

    Second ionization step:

    HSeO₄⁻ (aq) + H₂O (l) → H₃O⁺ (aq) + SeO₄⁻² (aq)

    Explanation:

    Selenic acid is a dyprotic and a strong acid with the formula: H₂SeO₄.

    When it reacts to water, it release two protons in two ionizations.

    Finally it gives hydronium to the medium.

    H₂SeO₄ (aq) + H₂O (l) → H₃O⁺ (aq) + HSeO₄⁻ (aq)

    HSeO₄⁻ (aq) + H₂O (l) → H₃O⁺ (aq) + SeO₄⁻² (aq)
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