Dilutions Worksheet
1) If I have 340 mL of a 1.5 M NaBr solution, what will the
concentration be if I add 560 mL more water to it?
2) If I dilute 250 mL of 0.50 M lithium acetate solution to a volume
of 750 mL, what will the concentration of this solution be?
3) If I leave 750 mL of 0.75 M sodium chloride solution uncovered
on a windowsill and 150 mL of the solvent evaporates, what
will the new concentration of the sodium chloride solution be?
4) To what volume would I need to add water to the evaporated
solution in problem 3 to get a solution with a concentration of
0.50 M?
5) If I add 25 mL of water to 125 mL of a 0.15 M NaOH solution,
what will the molarity of the diluted solution be?
6) If I add water to 100 mL of a 0.15 M NaOH solution until the
final volume is 150 mL, what will the molarity of the diluted
solution be?
7) How much 0.05 M HCl solution can be made by diluting 250 mL
of 10 M HCl?
8) I have 345 mL of a 1.5 M NaCl solution. If I boil the water until
the volume of the solution is 250 mL, what will the molarity of
the solution be?
Dilutions Worksheet
1) If I have 340 mL of a 1.5 M NaBr solution, what will the
concentration be if I add 650 mL more water to it?
2) If I dilute 250 mL of 0.50 M lithium acetate solution to a volume
of 550 mL, what will the concentration of this solution be?
3) If I leave 750 mL of 0.75 M sodium chloride solution uncovered
on a windowsill and 250 mL of the solvent evaporates, what
will the new concentration of the sodium chloride solution be?
4) To what volume would I need to add water to the evaporated
solution in problem 3 to get a solution with a concentration of
0.50 M?
5) If I add 125 mL of water to 125 mL of a 0.15 M NaOH solution,
what will the molarity of the diluted solution be?
6) If I add water to 150 mL of a 0.15 M NaOH solution until the
final volume is 350 mL, what will the molarity of the diluted
solution be?
7) How much 0.05 M HCl solution can be made by diluting 250 mL
of 10 M HCl?
8) I have 345 mL of a 1.5 M NaCl solution. If I boil the water until
the volume of the solution is 200 mL, what will the molarity of
the solution be?
9) How much water would I need to add to 500 mL of a 2.4 M KCl
solution to make a 1.0 M solution?
Dilutions Worksheet – Solutions
1) If I have 340 mL of a 0.5 M NaBr solution, what will the concentration be if
I add 560 mL more water to it?
0.19 M (the final volume is 900 mL, set up the equation from that)
2) If I dilute 250 mL of 0.10 M lithium acetate solution to a volume of 750 mL,
what will the concentration of this solution be?
0.033 M (the final volume is 750 mL, set up the equation from that.
Note that the phrasing difference between problems 1 and 2 makes a
big difference in the final answer).
3) If I leave 750 mL of 0.50 M sodium chloride solution uncovered on a
windowsill and 150 mL of the solvent evaporates, what will the new
concentration of the sodium chloride solution be?
0.63 M (this is the opposite of a dilutions problem – the V 2 value is
smaller than V1, but otherwise the equation is no different.)
4) To what volume would I need to add water to the evaporated solution in
problem 3 to get a solution with a concentration of 0.25 M?
1500 mL
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