Weight/Volume Percent
Home Up Volume Percent Weight Percent Weight/Volume Percent


Weight/Volume Percent

Another variation on percentage concentration is weight/volume percent or mass/volume percent. This variation measures the amount of solute in grams but measures the amount of solution in milliliters. An example would be a 5%(w/v) NaCl solution. It contains 5 g of NaCl for every 100. mL of solution.

Volume percent =

   weight of solute (in g)  
volume of solution (in mL)

x 100

Because of the different units in the numerator and denominator, this type of concentration is not a true percentage. It is used as a quick and easy concentration unit because volumes are easier to measure than weights and because the density of dilute solutions is generally close to 1 g/mL. Thus, the volume of a solution in mL is very nearly numerically equal to the mass of the solution in grams.


Top of Page

Back to Course Homepage

E-mail instructor: Eden Francis

Clackamas Community College
1998, 2003 Clackamas Community College, Hal Bender