TO
TEACHER
JULIE CHANNEL
WITH FREE POWERPOINT PRESENTATION
SCIENCE 7
First QUARTER- lc 8.1
Matatag curriculum
LESSON 1:
Properties of Solutions
CONTENT
Properties of Solutions
The learners shall learn the properties of
LEARNING
STANDARD solutions such as solubility and reaction to
litmus determine their use.
The learners shall be able to identify the role of the
LEARNING solute and solvent in a solution and to express
COMPETENCY quantitatively the
amount of solute present in a given volume of
solution.
OBJECTIVES
By the end of the lesson, the 80 percent of
the learners will be able to:
1. Define the term "solution" and identify its key
components (solute and solvent).
2. Demonstrate the ability to set up and conduct
laboratory experiments to investigate the
properties of solutions.
3. Appreciate the importance of understanding
solution properties by answering reflections.
I. Activating Prior Knowledge
"What is a
solution?“
I. Activating Prior Knowledge
"What is a
solution?“
Definition: A solution is a
homogeneous mixture
composed of two or more
substances.
It consists of a solute
I. Activating Prior Knowledge
"Can you
name
some
examples
I. Activating Prior Knowledge
Examples may
"Can you include:
name Saltwater
Sugary drinks
some Copper sulfate in
examples water
Alcohol in water
I. Activating Prior Knowledge
"What are
the main
components
of a
I. Activating Prior Knowledge
Solute: The substance that
is dissolved in the solvent.
"What are Solvent: The dissolving
medium that dissolves the
the main solute.
components
of a
B. Establishing Purpose of the Lesson
1. LESSON PURPOSE
In this lesson, we will be exploring the key
properties and characteristics of solutions.
Emphasize the importance of understanding
solution properties, as this knowledge is
fundamental to many areas of chemistry and
science.
B. Establishing Purpose of the Lesson
2. Unlocking Content Vocabulary: Match Type Activity
a homogeneous mixture
Solution composed of two or more
substances.
is the dissolving medium that
dissolves the solute to form a
Solute solution.
is the substance that is
dissolved in the solvent to form
Solvent a solution.
is the ability of a substance
Solubility (solute) to dissolve in a given
solvent to form a solution.
C. Developing and Deepening Understanding
Defining Solutions
Definition: A solution is a homogeneous mixture composed
of two or more substances.
It consists of a solute dissolved in a solvent.
C. Developing and Deepening Understanding
Components of a Solution
Solute: The substance that is dissolved in the solvent.
Solvent: The dissolving medium that dissolves the solute.
C. Developing and Deepening Understanding
Factors Affecting Solubility
Temperature: As temperature increases, the solubility
of most solids and gases in liquids increases.
Pressure: Increasing pressure generally increases
the solubility of gases in liquids.
Polarity: Polar solutes tend to dissolve in polar
solvents, and non-polar solutes tend to dissolve in
non-polar solvents.
C. Developing and Deepening Understanding
Measuring Concentration
Concentration: The measure of the amount of solute
dissolved in a given amount of solvent or solution.
C. Developing and Deepening Understanding
Measuring Concentration
Different ways to express concentration:
Molarity: Moles of solute per liter of solution.
Molality: Moles of solute per kilogram of solvent.
Mole fraction: The ratio of the moles of solute to the
total moles of all components in a solution.
C. Developing and Deepening Understanding
Colligative Properties
Colligative properties: Properties that depend on the
concentration of the solute, not its identity.
C. Developing and Deepening Understanding
Boiling Point Elevation
The presence of a solute in a
solution increases the boiling
point of the solution compared to
the pure solvent
The extent of the boiling point
elevation depends on the
concentration of the solute.
C. Developing and Deepening Understanding
Freezing Point Depression
The presence of a solute in a
solution decreases the freezing
point of the solution compared to
the pure solvent.
The extent of the freezing point
depression depends on the
concentration of the solute.
C. Developing and Deepening Understanding
Osmotic Pressure
Osmotic pressure is the pressure
that must be applied to a solution to
prevent the flow of water molecules
through a semipermeable
membrane.
Osmotic pressure depends on the
concentration of the solute in the
solution.
C. Developing and Deepening Understanding
Worked Example
Properties of Solutions
The learners will bring the following materials to perform a
simple activity that highlights the properties of solution.
Materials:
sugar transparent plastic cups of similar
sizes
salt 6 cups of water
mongo seeds 6 pieces spoons
powdered juice cheesecloth
C. Developing and Deepening Understanding
Worked Example
Properties of Solutions
Procedure:
1. Predict which among the given samples will dissolve in
water. Write your predictions in Column 2 of Table 1.
2. Put one cup of water in each of the cups.
3. Add ½ teaspoon of each of the six samples. Use the
teaspoon to mix thoroughly as much of each sample as
possible. Use a different teaspoon for each of the cups.
4. Filter the mixture with filter paper using a setup like Figure
1. You may use cheesecloth or old, white Tshirt with the
improvised funnel from the cut upper portion of the plastic
bottle.
C. Developing and Deepening Understanding
Worked Example
C. Developing and Deepening Understanding
Worked Example
Guide Questions:
1. Describe the mixture that resulted after mixing. Write your answer in
Column 3 of Table 1.
2. How many phases have you observed? Write your answer and
observations in Column 4.
3. Identify the solute in each of the mixtures. Write your answers on the
space provided below.
4. What is the solvent in each of the mixtures?
5. In which mixture were you able to separate the components (solute and
solvent)
by filtration? Write your observations in column 5 of Table 1.
6. Which of the samples are solutions? Write your answers in Column
7. Do you consider solutions as homogeneous mixtures? Why? Why not?
D. MAKING GENERALIZATION
Learners’ Takeaways
The learners will write down in
the box the words or phrases
which can be associated with
the properties of solution.
Has this lesson helped
you better understand
the properties of
solutions? If so, how?
E. EVALUATING LEARNING
__________1 Which of the following is a
characteristic of a solution?
a) Heterogeneous mixture
b) Solute particles larger than 1 nanometer
c) Separation of components over time
d) Homogeneous mixture
E. EVALUATING LEARNING
__________2. The solubility of a gas in a
liquid typically __________ as the
temperature increases.
a) Increases
b) Decreases
c) Remains the same
d) Depends on the pressure
E. EVALUATING LEARNING
__________3. Which of the following is a
colligative property of solutions?
a) Boiling point elevation
b) Density
c) pH
d) Both a and b
E. EVALUATING LEARNING
__________4. The measure of the amount
of solute dissolved in a given amount of
solvent or solution is known as:
a) Molarity
b) Molality
c) Mole fraction
d) All of the above
E. EVALUATING LEARNING
__________5. Osmotic pressure is the
pressure that must be applied to a solution
to:
a) Increase the boiling point
b) Decrease the freezing point
c) Prevent the flow of water molecules
through a semipermeable membrane
d) Increase the solubility of the solute
E. EVALUATING LEARNING
__________6. Which of the following statements
about solutions is true?
a) Solutions are always clear and transparent.
b) Solutions are stable and do not separate into
distinct layers.
c) Solutions have a uniform composition
throughout.
d) All of the above
E. EVALUATING LEARNING
__________7. Which of the following is the most
accurate way to express the concentration of a
solution?
a) Grams of solute per liter of solution
b) Milliliters of solute per milliliters of solution
c) Moles of solute per liter of solution
d) Grams of solute per grams of solution
E. EVALUATING LEARNING
__________8. The decrease in the freezing point
of a solution compared to the pure solvent is
known as:
a) Boiling point elevation
b) Freezing point depression
c) Osmotic pressure
d) Solubility
E. EVALUATING LEARNING
__________9. Which of the following is NOT a
factor that affects the solubility of a substance?
a) Temperature
b) Pressure
c) pH
d) Polarity
E. EVALUATING LEARNING
__________10. Which of the following statements about
the solute in a solution is true?
a) The solute is the major component in the solution.
b) The solute particles are larger than 1 nanometer in
diameter.
c) The solute particles are evenly distributed throughout
the solvent.
d) The solute particles settle out and separate from the
solution over time.
E. EVALUATING LEARNING
ANSWERS KEY
1. d) Homogeneous mixture
2. b) Decreases
3. a) Boiling point elevation
4. d) All of the above
5. c) Prevent the flow of water molecules through a
semipermeable membrane
6. d) All of the above
7. c) Moles of solute per liter of solution
8. b) Freezing point depression
9. c) pH
10. c) The solute particles are evenly distributed throughout the
solvent.
Reference :
•SCIENCE 7 LESSON EXEMPLAR
textbooks
•• Chang, R., & Goldsby, K. A. (2013). Chemistry (11th ed.). McGraw-Hill Education.
•• Zumdahl, S. S., & Zumdahl, S. A. (2014). Chemistry (9th ed.). Cengage Learning.
•Slide 3: Online Resources
•• Khan Academy. (n.d.). Solutions and solubility.
https://www.khanacademy.org/science/chemistry/states-of-matter-and-intermolecular-
forces/solutions-and-solubility/a/solutions-and-solubility
•• American Chemical Society. (n.d.). Properties of solutions.
https://www.acs.org/content/acs/en/education/resources/highschool/chemmatters/past-
issues/2017-2018/december-2017/properties-of-solutions.html
•• Boundless Chemistry. (n.d.). Colligative properties.
https://courses.lumenlearning.com/boundless-chemistry/chapter/colligative-properties/
•Slide 4: Journal Articles
•• Atkins, P., & de Paula, J. (2006). Atkins' Physical Chemistry (8th ed.). Oxford
University Press.
•• Raoult, F. M. (1887). Loi générale des tensions de vapeur des dissolvants.
Comptes Rendus, 104, 1430-1433.
•• Van 't Hoff, J. H. (1887). The role of osmotic pressure in the analogy between
