Question

A small crystal of the slightly soluble salt, CaSO4, dissolves in a solution of calcium sulfate. The original solution must have been:

dilute and saturated
dilute and unsaturated
concentrated and saturated
concentrated and unsaturated

Answer 1

it has to be dilute since the crystal dissolved and unsaturated for the same reason so B

Answer 2

dilute and unsaturated

Step-by-step explanation:

A dilute solution has a low concentration of solute in solvent. A concentrated solution has a high concentration of solute in solvent. In an unsaturated solution more solute can be dissolved in the solvent to form a solution. In a saturated solution more solute cannot be dissolved in the solvent to form a solution.

Since more CaSO₄ can be dissolved in CaSO₄ solution the solution is both dilute and unsaturated.