Answer: quantity of solute dissolved in a given quantity of solvent
Explanation:-
Dilute : is defined as a solution in which amount of solvent is more than the amount of solute.
Concentrated: is defined as a solution in which amount of solute is more than the amount of solvent.
ppm: ppm is defined as the concentration when 1 part of the solute is dissolved per 1 million of the solution.
Molarity: Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
Molality : Molality of a solution is defined as the number of moles of solute dissolved per kg of the solvent.
Normality: Normality of a solution is defined as the number of ram equivalents of solute dissolved per Liter of the solution.