Chemicals of the Hydrosphere

Question 1

Why is seawater in the hydrosphere salty?

Answer 1

Because it contains dissolved ionic compounds called salts

Question 2

Give an example of this

Answer 2

Sodium chloride is an ionic compound made from positive sodium ions and negative chloride ions.
The ions are electrostatically attracted to each other to form a giant 3D crystal lattice with high melting and boiling points