In order to make a solution, we often take a sample of a concentrated stock solution and add solvent to it to dilute it to the desired concentration. The dilution equation provides an easy means of de...In order to make a solution, we often take a sample of a concentrated stock solution and add solvent to it to dilute it to the desired concentration. The dilution equation provides an easy means of determining the amount of stock solution and solvent needed for a desired dilution.