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8 February, 03:56

Name a method that could be used to separate magnesium hydroxide from sea water

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  1. 8 February, 06:35
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    Add limewater

    Explanation:

    Ca (OH) ₂ is about 1000 times more soluble than Mg (OH) ₂

    If you add limewater to the seawater, the magnesium ions will precipitate out as magnesium hydroxide.

    Mg²⁺ (aq) + 2OH⁻ (aq) ⟶ Mg (OH) ₂ (s)
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