The administration of a percent aqueous solution may be dictated either by the weight or volume to give.


percent aqueous solution =

= (gram of solute) / (100 mL of solution)


If a given weight of solute is to be given:


volume in mL of a percent solution to give to deliver X grams of solute =

= X / (percent solution) * 100


grams of solute in Y mL of a percent solution =

= (percent solution) / 100 * Y


NOTE: A dilute solution may be made by adding the solute to 100 mL of water (weight for weight solution). For more concentrated solutions a volumetric flask is used to determine the final volume, which may require less than 100 mL water.


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