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Topic 7: Solutions

18. Parts Per Million concentration calculation: Calculation of ppm from
mass (g) of solute and grams (g) of solution

1. What is the concentration of O2(g), in parts per million, in a solution that contains 0.008 grams of
O2(g) dissolved in 1000 grams of H2O(l)? 3) 8 ppm

1) 0.8 ppm
2) 80 ppm 4) 800 ppm

2. A 3000 grams solution contains 1.5 grams of dissolved NaCl salt. What is the concentration of this
solution in ppm? 2
-3
1) 5.0 x 10 3) 4.5 x 10
4
3
2) 2.0 x 10 4) 4.5 x 10

3. A 500 gram of oxygen solution contains .05 grams of dissolved oxygen. The concentration of this
-1Teacher Preview Copy
Teacher Preview Copy
solution expressed in parts per million is closest to 3) 1.0 x 10 ppm
-4
4

1) 1.0 x 10 ppm
2
7
2) 1.0 x 10 ppm 4) 2.5 x 10 ppm

4. What is the concentration in parts per million of a solution containing 20 grams of C6H12O6 in 80.0
grams of H2O?
5
6
1) 2.50 x 10 ppm 3) 4.00 x 10 ppm
5
6
2) 2.00 x 10 ppm
4) 5.00 x 10 ppm
5. What is the concentration in parts per million of a solution containing 333 grams of NaNO3 in
700 grams of H2O? 6 3) 4.75 x 10 ppm
5
1) 2.10 x 10 ppm
5
6
2) 3.10 x 10 ppm 4) 3.22 x 10 ppm

6. A student prepared a CaCl2(s) solution by adding 1.0 gram of the salt to a 1000 gram of H2O (l). The
concentration of this solution is -3
-4
1) 1.00 x 10 ppm 3) 1.0 x 10 ppm
3
4
2) 1.00 x 10 ppm
4) 1.00 x 10 ppm

19. Parts Per Million Concentration calculation: Calculation of mass (g) of solute from
ppm and grams of solution
1. What is the total mass of solute in 1000 grams of a solution having a concentration of 5 parts per
million?
1) 0.005 g 3) 0.5 g
2) 0.05 g
4) 5 g

2. How many grams of KNO3 are needed to be dissolved in water to make 100 grams of a 250 ppm
solution?
-3
1) 2.5 x 10 g 3) 2.5 x 10 g
-4
-2
2) 2.5 x 10 g 4) 2.5 x 10 g

3. How many grams of NaCl are needed to be dissolved in water to make 2000 grams of a 100 ppm
solution? 3) 0.2 g
1) 2 g
2) .05 g 4) 0.5 g

4. A 500 gram C6H12O6 solution has a concentration of 300 ppm. How many grams of C6H12O6 (s) ) is
in this solution?
-1
-1
1) 1.5 x 10 g 3) 4.5 x 10 g
1
1
2) 1.5 x 10 g 4) 4.5 x 10 g

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