Tasks and exercises
1.
How many grams of salt must be added to 10 grams of water to create a
10% solution?
2.
How many grams of NaBr are needed to make 30 g of a 2.0%
solution?
3.
If 30 grams of NaOH are dissolved and then diluted to 2.0 L with
water, what is the concentration of the solution?
4.
What mass of salt is needed to make 300 mL of a 2 g/L
solution?
5.
What mass of NaF must be mixed with 25 mL = 25 g (because of water's
density) of water to create a 3.5% solution.
6.
Two grams (2.0 g) of salt are mixed with 50 grams of water. Find the
mass % of the solution.
7.
If a 4000g solution of salt contains 40g of salt, what is its mass
percent?
8.
How would you make 120 mL of a 0.10 M solution of potassium hydroxide
in water?
9.
Find the percent (w/w) concentration of a solution containing 4.5 g
of glucose in 90 mL of water.
10. Describe how you would prepare 30 g of a 20 percent (w/w) solution of
KCl in water.
11. How much potassium bromide, in grams, should be added to water to
prepare 0.50 L of solution with a molarity of 0.125 M?
12. How much concentrated 18 M sulfuric acid is needed to prepare 100.0
mL of a 6.0 M solution?