Unit 2, Lesson 2.4 - Solutions Lesson Outline: 1. Solutions (Video) 2. Types of Solutions 3. Concentrations of Solutions

1. SOLUTIONS
(UNIT TWO, LESSON 2.4)
BY MARGIELENE D. JUDAN

2. LESSON OUTLINE
Solutions (Video)
Types of Solutions
Concentrations of Solutions

3. Before we watch the video, copy
these questions first in your
notebook. Be sure to make spaces
for your answers. You will find the
answers on the video.

4. 1. What is a solvent?
2. What is a solute?
3. Give examples of solvent and solute?
4. Give examples of dissolvable and non-
dissolvable in water.
5. What are the factors that affect
solubility?

6. ANSWER FOR 5 MINUTES IN YOUR NOTEBOOK:
1. What is a solvent?
2. What is a solute?
3. Give examples of solvent and solute.
4. Give examples of soluble and insoluble
substances in water.
5. What are the factors that affect
solubility?

7. 1. WHAT IS A SOLVENT?
The one that dissolves solute
It makes up most of the solution
Water is the universal solvent

8. 2. WHAT IS A SOLUTE?
That one that is being dissolved in
the solvent
They are less than solvents.

9. 3. GIVE EXAMPLES OF SOLVENT AND
SOLUTE.
Solvents are those that dissolves the
solutes. They usually make up most
of the volume of a solution.
(ex. Solvents- water, oil; Solutes- salt,
sugar)

10. 4. GIVE EXAMPLES OF SOLUBLE AND
INSOLUBLE SUBSTANCES IN WATER.
Miscible means soluble (ex. sugar,
salt, juice powder, milk powder, soil)
Immiscible means insoluble (ex. oil,
sand, white pepper, rubber, paper)

11. 5. WHAT ARE THE FACTORS THAT AFFECT
SOLUBILITY?
Mixing
Quantity of solvent
Temperature
Time
Pressure
Nature of solute and solvent (miscible and
immiscible)

12. TYPES OF SOLUTIONS
Saturated solutions
Unsaturated solutions
Supersaturated solutions

13. SATURATED SOLUTIONS
Contains the maximum amount of solute
dissolved in a given amount of solvent
If you add more solute to the solvent, it won’t
dissolve anymore.

14. UNSATURATED SOLUTIONS
Contains less dissolved solute than a saturated
solution under given temperature and
pressure.
Solubility changes with temperature.

16. SUPERSATURATED SOLUTIONS
Contains more dissolved solute
than a saturated given the same
temperature (ex. cloud seeding)
Becomes unstable, crystals form
Can be created by heating the
solution then cooling it down

18. CONCENTRATIONS OF SOLUTIONS
Concentrated – contains larger
amount of solute than the
solvent
Diluted – contains small amount
of solute

19. CONCENTRATIONS OF SOLUTIONS
Concentrated is not the
same with saturated
neither diluted with
unsaturated!

20. CONCENTRATIONS OF SOLUTIONS
We determine the
amount of solute by two
types:
1. Mass
2. Volume

21. PERCENT BY MASS
Percent by mass = Mass of solute
Mass of solution
X 100

22. PERCENT BY VOLUME
Percent by mass = Volume of solute
Volume of solution
X 100

23. DISCUSSION: NOTEBOOK
1. Find the percent by mass of the following
solutes:
a. 70 g of salt in 350 g solution
b. 1 kg of sugar in 2 kg solution

24. DISCUSSION: NOTEBOOK
2. Find the percent by volume of the following
solutes:
a. 250 mL oil in 750 mL of water
b. 1 L of chlorine in 1,000 L pool solution

25. ANSWERS:
1. Find the percent by mass of the following
solutes:
a. 70 g of salt in 350 g solution
70 g ÷ 350 g × 100 = 20%
b. 1 kg of sugar in 2 kg solution
1 kg ÷ 2 g × 100 = 50%

26. ANSWERS:
2. Find the percent by volume of the following
solutes:
a. 250 mL oil in 750 mL of water
250 mL ÷ (750 mL + 250 mL) × 100
250 mL ÷ 1,000 mL × 100 = 25%
Based on the formula, we divide the volume of
solvent by the volume of solution, not by the
volume of solvent.
Volume of solution = vol. of solute + vol. of solvent

27. ANSWERS:
2. Find the percent by volume of the following
solutes:
b. 1 L of chlorine in 1,000 L pool solution
1 L ÷ 1,000 L × 100 = 0.1%

28. ASSIGNMENT: NOTEBOOK
1. Find the percent by mass of the following
solutes:
a. 80 g of oil in 5600 g solution
b. 100 g of juice powder in 900 g water

29. ASSIGNMENT: NOTEBOOK
2. Find the percent by volume of the following
solutes:
a. 25 mL ice cube in 875 mL of oil
b. 500 mL of chlorine in 1,000 L pool solution

30. SOURCES:
Science Links 7
https://www.youtube.com/watch?v=e-
2EoyDYamg