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24-11-2019
Chemistry

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

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24-11-2019

Answer:

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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