1. If more solute is added and it does not dissolve, then the original solution was saturated. If the added solute dissolves, then the original solution was unsaturated. A solution that has been allowed to reach equilibrium but which has extra undissolved solute at the bottom of the container must be saturated

2.I’ve changed application to where are they found, because this makes more sense.

Unsaturated solutions: found in the vast majority of solutions. eg. blood, soda, alcoholic drinks, cell sap, battery acid.

Supersaturated solutions: invert sugar (a mixture of glucose and fructose), gasses dissolved in crude oil when it is still untapped, some clouds (those that cause cloudbursts).

saturated solution: the carbon dioxide dissolved in sodas (unopened), nitrogen in the air in the earth.

pa brainliest <3