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Which Element Is Most Common Dissolved In Seawater ?

The most common element dissolved in seawater is sodium. The concentration of sodium in seawater is approximately 35 grams per kilogram of water, which is equivalent to 35 parts per million (ppm).

The next most common element dissolved in seawater is chloride. The concentration of chloride in seawater is approximately 25 ppm. Chloride is the primary component of table salt.

Sodium and chloride are not the only elements that dissolve easily in water; many other elements do as well. For example, calcium, magnesium and potassium are all dissolved in seawater at concentrations lower than those of sodium and chloride but higher than those of most other elements.

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Last modified: August 9, 2022