Concentration Part A

1. 3.1 – To prepare specific volumes of
solutions at a specific concentration
CONCENTRATION

2. SOLUTION
Madeup of
SOLUTE SOLVENT
Thesubstancedissolved Theliquidthesoluteisdissolvedin (Ex.
water)

3. Common Solutions
in the world…..
http://www.nrprcd.org/photo_gallery/rcd_03/coordinator_breakfast/images/orange_juice.jpg
Chocolate Milk
Solute: chocolate
powder
Solvent: milk
http://www.seedownunder.com.au/destination/queensland/noosa/noosa-accommodation/noosa-heads/ocean_breeze/images/OCEAN_BR
Salt Water
Solute: salt
Solvent: water
sdfsdf
Orange Juice
Solute: orange concentrate
Solvent: water

4. Measurement of the amount of
solute that is dissolved in a given
amount of solution
Mass of solute(g)
Volume of solution (L)
(C)
C = M
V
g/L

5. 1 L = 1000ml
C = M
V
 A solution with concentration of
10 g/L will have 10 grams of solute for
every 1 L (1000ml) of solution
 When comparing solutions be sure to have
the same unit of measurement
(grams/litre)
 NOTE: To ensure you always have the
correct units for concentration (grams/litre)
we will the change the formula slightly:
C = g
L

6. Concentration
2 scoops
1 scoop
1 litre of solvent 1 litre of solvent

7. What is the concentration of a
solution that has volume of 500ml
and contains 40 g of solute?
C = ?
G = 40 g
L = 0.5 L
C = 40 g
0.5 L
C = 80g/L
C = g
1 L
C = M
V

8. You have a 5 g/L of a salt solution with
a volume of 50 ml. What is the amount of
solute (salt) in this solution?
GIVEN INFORMATION
C = 5 g/L
G = ?
L = 0.05 L
50 ml = 0.05 L
C g
1 L

5 g
1 0.05

g = 0.25 grams
Cross multiply
C=M
V
C=g
L

9. Each can contains sugar ( ) and water.
Which can has the strongest
concentration?
Water (50ml) Water (0.25 L)Water (25 ml) Water (125ml)
Remember…Keep
the units the same!!= 1 particle (1g)
C = 100 g/L C = 80 g/L C = 28 g/L C = 32 g/L

10. How much solute is there in a 50g/L
solution if it has a volume of 250ml?
C = 50 g/L
G = ?
L = 250ml
.25L
50 = ?
0.25 L
G = 12.5 g
C = g
L

11. You have a solution that has a
concentration of 22 g/L. There is 30 grams of
solute in this solution. What is the volume in
mL of the solution?
GIVEN INFORMATION
C = 22 g/L
G = 30
L = ?
C g
1 L

22 30
1 L

V = 1.36 L or 1360 ml
Cross multiply
C=M
V
The volume of the
solution is 1360 ml.

12. List these solutions in order from
highest to lowest concentration
20 g/L
5 g/ml
6g/50ml
13 g /150ml
YOU HAVE TO HAVE THE
SAME UNITS IN ORDER TO
COMPARE THEM!
0.001
5
C  5000g/LC 
0.05
6
C  120g/LC 
0.15
13
C  86.67g/LC 
C=g
L

13. Place small amount of solvent
(liquid) into container
Add the solute
Dissolve by shaking or swirling
Add enough solvent (liquid) to
reach the desired volume
DO NOT put all of the
solvent and solute
together at
once…inaccurate results!

14. Find you how much grams you need.
Describe the procedure that would be
used to prepare 250 ml of a sugar solution
that has a concentration of 13 g/L.
BE SPECIFIC……
0.250
g
13  grams25.3g 
Write out procedure using a step by step method!
1. Pour half of the required volume (125 ml) into a
beaker
2. Add the solute (3.25 grams) to the beaker
3. Mix them together
4. Add the solvent (liquid) until you reach the desired
amount (250 ml)
C=g
L

15. o Concentration Formula C =M/V
(C=g/L)
o To Prepare a Solution You….
-pour half of required amount of solvent in
beaker
-Add desired amount of solute
-Mix
-Add solvent (liquid) till your beaker reaches the
required amount

16.  Study guide, Module 3, page 14
 Text book page 351 # 5, 6, 7
 Worksheet # 4