How to Find Mass Percentage

Mass percentage refers to the ratio of a mass of a compound in the solution to the total mass of the solution.
••• chemistry image by david hughes from Fotolia.com

Mass percentage is one of the ways to express the concentration of a dissolved substance in a solution. Mass percentage refers to the ratio (expressed in percents) of a mass of a compound in the solution to the total mass of the solution. For instance, calculate the mass percent concentration for the solution obtained by dissolving 10 g of sodium chloride (NaCl) and 6 g of sodium bicarbonate (NaHCO3) in 120 g of water.

    Add up the mass of all compounds in the solution, including the solvent, to calculate the total mass of the solution. In the example, the solution mass is equal to mass (NaCl) + mass (NaHCO3) + mass (water) = 10 g + 6 g + 120 g = 136 g.

    Divide the mass of the first dissolved component by the solution mass, and then multiply the result by 100 to calculate the mass percentage. In our example, the first dissolved compound is NaCl; the mass percent is (10 g / 136 g) x 100 percent = 7.35 percent.

    Divide the mass of the second dissolved component by mass of the solution followed by multiplying by 100 to calculate the mass percentage. In this example, the second dissolved compound is NaHCO3, and its mass percentage is (6 g / 136 g) x 100 percent = 4.41 percent.

Related Articles

How to Change the Molarity of a Solution
How to Dissolve Magnesium Chloride
How to Calculate Percent Solids by Weight
How to Calculate Solubilities
How to Calculate Concentration From Density
How to Calculate Particle Concentration
How to Calculate the Density of a Solution
How to Find the Mole Fraction
How to Make a Five Percent Solution With Salt
Conversion of PPM to Micromoles
How to Convert Micromolar to PPM
How to Calculate the Final Concentration of a Solution...
How to Calculate Solid Concentration
Density Vs. Concentration
How to Calculate Mole Fractions Using Mass Percent
How to Make a 1% Sucrose Solution
How to Find the Percent of Concentration of Copper...
How to Calculate Millimolars
How to Calculate Mole Percent
How to Calculate Molarity (M) in Chemistry