Worksheet : PPM
Name:____________________________________
If you can find milligrams (mg) per litre (L), you have found ppm! Milligram (mg) per
kilogram (kg) also works. Some conversions:
g to mg (× 1,000)
%m/V x 10,000 = ppm
1mL of water = 1g
mL to L (÷ 1,000)
g/L x 1,000 = ppm
1. A solution is prepared by dissolving 100.0 mg of cesium chloride (CsCl) in 5.0 L
of water. Calculate the ppm of cesium chloride in the solution.
2. A solution is prepared by dissolving 16 mg sucrose (C12H22O11) in 800 mL H2O.
Calculate the concentration in parts per million of sucrose in the solution.
3. How many milligrams (mg) of K2SO4 would you need to prepare 1500 mL of 60
ppm K2SO4 solution?
4. Helium gas, 5.0 x 10 -4 g, is dissolved in 200 g of water. Express this
concentration in parts per million.
5. A sample of 300.0 mL of drinking water is found to contain 42 mg Pb. What is
this concentration in parts per million?
6. A solution of lead sulfate (PbSO4) contains 0.425 g of lead sulfate in 25 L of
water. What is this concentration in ppm?
7. A 900.0 g sample of sea water is found to contain 6.7 x 10 -3 g Zn. Express this
concentration in ppm.
8. A solution is prepared by dissolving 0.05 g of cesium chloride (CsCl) to a
concentration of 50 ppm. Calculate the volume of the cesium chloride solution.
9. A solution is prepared by dissolving 12 mg sucrose (C12H22O11) and having a
concentration of 4 ppm. Calculate the volume of the solution.
10. How many grams of K2SO4 would you need to prepare 1.5 L of 30 ppm K2SO4
solution?
11. Helium gas, 2.0 x 10 -4 g, is dissolved in water to a concentration of 2 ppm (parts
per million). What volume of water was used?
12. A solution of lead sulfate (PbSO4) contains 0.0042 g of lead sulfate and has a
concentration of 7 ppm. What is the volume of the solution?