AP BIOLOGY

Detailed explanation-1: -In a solution, the substance which is dissolved is called a solute and the substance in which the solute is dissolved is called a solvent. To obtain salt solution, salt is mixed in water and hence salt is the solute and water is the solvent.

Detailed explanation-2: -Alternatively, because a solution can only contain one solvent, by definition, after identifying water, H2O, as the solvent in this solution, sodium chloride, NaCl, can be classified as a solute “by default."

Detailed explanation-3: -For example, in a solution of salt in water, the solute is salt, and solvent is water.

Detailed explanation-4: -The molecules that dissolve in the solvent are called the solutes. Therefore, in a solution of salt (NaCl) and water, the water is the solvent and the sodium and chloride are the solutes.

Detailed explanation-5: -In the solution of seawater, water is the solvent. The hydrogen and oxygen atoms in water molecules make up about 96.5 percent of the mass of seawater. This means that in a seawater solution, about 3.5 percent of the mass is made up of dissolved solutes like Na+ and Cl– (Fig.