A substance that is dissolved in liquid is a solute.
Solute is a substance that is low in acid and abundant in pKa. A liquid that
dissolves a solute is called a solvent.
Some examples of solute and solvent:
=> Sugar dissolve in water, in where sugar is the solute and water is the
solvent.
=> Water and powdered juice, in where water is the solvent and powdered
juice is the solute.
But take note that not all solute are solid, some solute are also liquid.