1. Solutions

2. Matter Mixtures Pure Substances
Heterogeneous Mixtures
Homogeneous Mixtures
Compounds
Elements
Colloids
Solutions

3. Solution
a solute is dissolved in another substance, known as a solvent.
Salt:
the solute
Water:
the solvent

5. Concentration
200mL 200mL 100mL

6. Concentration
200mL 200mL 100mL

7. Concentration Ratio of solute to solution Ex 7g / L (solute)
(solute + solvent)

8. Concentration . Mass (grams) Concentration (g/L) Volume (Litres)
What is the concentration of the solution prepared by adding 1g of salt to 500mL of water?
. Mass (grams)
Concentration (g/L)
Volume (Litres)

9. Concentration May also be written as a percent
Ex. Concentration of 5% = 5g
100mL
% mass/mass
% volume/volume Or
% mass/volume

10. Dilutions

11. Dilutions
Decreasing the concentration of a solution by adding solvent to it.
When dilution occurs, the solute is more spread out in the solvent

12. Formula for dilutions C1 V1 = C2 V2
C1 = concentration of original (initial) solution
C2 = concentration of final solution
V1 = initial volume
V2 = final total solution (V1 + water)

13. Helpful Hints
C1 is always greater or less than C2 ?

14. Helpful Hints C1 is always greater or less than C2 ?
V2 is always greater or less than V1?

15. Helpful Hints C1 is always greater or less than C2 ?
V2 is always greater or less than V1?
“C” units are g/L, g/mL or %
“V” units are mL or L

16. Helpful Hints The units for both Cs must be the same
The units for both Vs must be the same
1L = 1000 mL

17. Examples
Calculate the new concentration if enough water is added to 100mL of 25g/L sodium chloride to make up 1.5L.