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10 January, 00:06

When aqueous solutions of lead (II) nitrate and potassium iodide are mixed, what is the formula for the insoluble solid (precipitate) that forms?

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  1. 10 January, 00:15
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    The formula for the precipitate is PbI₂

    Explanation:

    The chemical reaction is:

    Pb (NO₃) ₂ (aq) + 2KI (aq) → 2KNO₃ (aq) + PbI₂ (s) ↓

    All the iodides, with these cations (Ag⁺, Pb²⁺, Cu⁺, Hg²⁺, Bi⁺³ and Sn⁺⁴) produce insolubles solid.
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