Asubstance that is dissolved in liquid is a

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.

I'm pretty sure that's called a volcano