Discussion
The most abundant salt present in the sea water is ...............
Answer: D
The most abundant salt is Sodium chloride.
Of the salts dissolved in seawater, sodium chloride (common salt) makes up about 78 per cent by the classic analysis of Dittmar. It is followed by magnesium chloride (about 11 per cent), magnesium sulphate (about 5 per cent), calcium sulphate and potassium sulphate.
Magnesium chloride is the second most abundant, which makes it the trap. Sodium sulphate is not one of the main salts in that list, and calcium carbonate is only a fraction of a per cent of the total, because marine organisms use it to build shells.
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