Science 7

2. Percent by
Mass and
Volume

3. Percent by Mass
-Percent by mass is the ratio of the mass of the
solute with the mass of the solution
Formula:

4. Example
1. A 300 grams sugar solution contains
15 grams sugar. What is the percent by
mass of the solute in the solution?

5. Solve
1. A 150 grams salt solution contains 25
grams sugar. What is the percent by
mass of the solute in the solution?

6. Solve
2. A saline solution with a mass of 355 g
has 36 g of NaCl dissolved in it. What is
the mass/mass percent concentration of
the solution?

7. Example:
2. You prepared an orange juice by
adding 75 grams of powdered juice to
175 grams of water. Determine the
percent by mass of the solution.

8. Solve:
1.A solution was prepared by dissolving
25.0 g of sugar into 100. 0 g of water.
What is the percent by mass of a
solution

9. Solve:
1.Suppose a solution was prepared by
mixing 20 g of sugar into 75 g of water.
What is the percent by mass of a
solution?

10. Solve
What is the percent by mass of a solution
if a solution if it has 5 g of salt for every
95 g of water?