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11 January, 08:15

Combining aqueous solutions of bai2 and na2so4 affords a precipitate of baso4. Which ions are spectator ions in the reaction?

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  1. 11 January, 11:57
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    I⁻ (aq) and Na⁺ (aq)

    Explanation:

    We have the chemical reaction:

    BaI₂ + Na₂SO₄ → BaSO₄ + 2 NaI

    However if you want to determine the spectator ions you need to write the states of compounds:

    (aq) - ions dissolved in water

    (s) - solid

    Ba²⁺ (aq) + 2 I⁻ (aq) + 2 Na⁺ (aq) + SO₄²⁻ (aq) → BaSO₄ (s) + 2 Na⁺ (aq) + 2 I⁻ (aq)

    The ions which does not change the state and remains dissolved in the solution are spectator ions. For our chemical reaction we have the following spectator ions:

    I⁻ (aq) and Na⁺ (aq)
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