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)
One can find there are 6 carbon atoms<span>, 12 hydrogen atoms and 6 oxygen atoms in one molecule of glucose. Hope this helps :) Have a great day :) Remember to always be positive :) </span>