1st QUARTER
WEEK 6
MODULE
4 Properties of Solutions
I. Learning Competency
1. Investigate properties of unsaturated or saturated solutions
INTRODUCTION
A solution has two components; the solute and the solvent. A component present in small amounts is
called solute and the component present in greater amount is called solvent. The solute is the substance that is
being dissolved, while the solvent is the dissolving medium. Solute and solvents may be solid, liquids, or
gases.
In Grade 6, you have learned about different mixtures and their characteristics. You have
done several activities where you mixed a solid and liquid or combined two different liquids. In
the process of mixing, you have observed that these either form homogeneous or heterogeneous
mixtures. Homogeneous mixture is when all parts of the mixture have uniform appearance and
properties. When different parts of the mixture are visible to the unaided eye and these parts are
obviously different from one another, it is heterogeneous. A heterogeneous mixture has non-
uniform appearance consists of two or more phases.
Solutions are homogeneous mixtures. When you put salt into water, the solid becomes part
of the liquid and cannot be seen. You can say that the salt dissolved in water or the salt is
soluble in water. Solutions may be solids dissolved in liquids or gases dissolved in liquids. There
are also solutions where a gas is dissolved in another gas, a liquid in another liquid or a solid in
another solid. Gaseous, liquid, and solid solutions are all around you.
Discover Most of the materials that are used to
regulate life processes are in the form of
solutions. The air we breathe, the water we
drink, food nutrients absorbed by the
intestinal walls of animals, the minerals absorbed by plants from the soil are in the form of
solutions and the coffee that your parents drink every morning is a solution. Did you know that?
Here in Ilocos Region particularly in the province of Iloccos Sur is also known for its Robusta
coffee which was hailed as the best quality coffee during the 2018 Philippine Coffee Quality
Competition.
The substances that make up a homogeneous solution are called components
of the solution. The components of a solution are the solute and the solvent. The solute is the
substance being dissolved or the component that is present in smaller amount. On the other
hand, the solvent is the medium in which the solute is dissolved or the component that is
available in greater quantity. For example, in a solution containing 15 grams of sugar and 100
mL water, the solute is the sugar and the solvent is water.
Solutions can be classified based on the final observable phase. Thus, solutions can be
classified as gaseous, liquid or solid. In gaseous solutions, both the solute and the solvent are in
the gas phase. In liquid solutions, the solute is in any phase while the solvent is in the liquid
phase. Solid solutions consist of solute in any phase in a solid solvent.
When there is a maximum amount of solute that can dissolve in a given amount of solvent
at a certain temperature, this is called solubility of the solute.
Another basis for classifying solutions is the amount of solute dissolved in the given solvent.
The solution that contains the maximum amount of solute dissolved by a given amount of
, Science Grade 7
Name: ____________________________________
Activity 1: What is the Evidence that a Solution is Saturated?
After performing the activity, you will be able to:
1. determine how much solid solute dissolves in a given volume of water;
2. describe the appearance of a saturated solution.
Materials needed CAUTION: Use carefully the following
6 teaspoons sugar laboratory instruments/kitchen
1 cup of water materials to avoid damage and
1 measuring cup ( 1 cup capacity) accident during the conduct of activity
1 measuring spoon (½ tsp capacity)
2 small clear, transparent bottles
2 stirrers/ spoon
Procedure
1. Pour 20 mL ( approximately 2 tablespoons) of water in a small transparent bottle.
Add ½ teaspoon of sugar and stir.
Q1. What is the appearance of the solutions? Write your observations.
2. To the sugar solution in step #1, add ½ teaspoon sugar, a small portion at a
time and stir the solution to dissolve the sugar. At this point, you have added
1 teaspoon sugar.
3. Add ½ teaspoon of sugar to the sugar solution in step #2 and stir the solution.
At this point, you have added one and ½ teaspoons of sugar.
4. Continue adding ½ teaspoon sugar to the same cup until the added sugar no
longer dissolves.
Q2. How many teaspoons of sugar have you added until the sugar no
longer dissolves? _________ Teaspoons
Note: In this step, you will observe that there is already excess sugar
which did not dissolve.
Q3. So, how many teaspoons of sugar dissolved completely in 20 mL of
water? ____________ Teaspoons
Note: This is now the maximum amount of sugar that will completely
dissolve in 20 mL of water.
Activity 2: SOLUTE OR SOLVENT?
Directions: Identify the solute and the solvent in the given solutions below.
Solution Solute Solvent
Salt water
WEEK 6
MODULE
4 Properties of Solutions
I. Learning Competency
1. Investigate properties of unsaturated or saturated solutions
INTRODUCTION
A solution has two components; the solute and the solvent. A component present in small amounts is
called solute and the component present in greater amount is called solvent. The solute is the substance that is
being dissolved, while the solvent is the dissolving medium. Solute and solvents may be solid, liquids, or
gases.
In Grade 6, you have learned about different mixtures and their characteristics. You have
done several activities where you mixed a solid and liquid or combined two different liquids. In
the process of mixing, you have observed that these either form homogeneous or heterogeneous
mixtures. Homogeneous mixture is when all parts of the mixture have uniform appearance and
properties. When different parts of the mixture are visible to the unaided eye and these parts are
obviously different from one another, it is heterogeneous. A heterogeneous mixture has non-
uniform appearance consists of two or more phases.
Solutions are homogeneous mixtures. When you put salt into water, the solid becomes part
of the liquid and cannot be seen. You can say that the salt dissolved in water or the salt is
soluble in water. Solutions may be solids dissolved in liquids or gases dissolved in liquids. There
are also solutions where a gas is dissolved in another gas, a liquid in another liquid or a solid in
another solid. Gaseous, liquid, and solid solutions are all around you.
Discover Most of the materials that are used to
regulate life processes are in the form of
solutions. The air we breathe, the water we
drink, food nutrients absorbed by the
intestinal walls of animals, the minerals absorbed by plants from the soil are in the form of
solutions and the coffee that your parents drink every morning is a solution. Did you know that?
Here in Ilocos Region particularly in the province of Iloccos Sur is also known for its Robusta
coffee which was hailed as the best quality coffee during the 2018 Philippine Coffee Quality
Competition.
The substances that make up a homogeneous solution are called components
of the solution. The components of a solution are the solute and the solvent. The solute is the
substance being dissolved or the component that is present in smaller amount. On the other
hand, the solvent is the medium in which the solute is dissolved or the component that is
available in greater quantity. For example, in a solution containing 15 grams of sugar and 100
mL water, the solute is the sugar and the solvent is water.
Solutions can be classified based on the final observable phase. Thus, solutions can be
classified as gaseous, liquid or solid. In gaseous solutions, both the solute and the solvent are in
the gas phase. In liquid solutions, the solute is in any phase while the solvent is in the liquid
phase. Solid solutions consist of solute in any phase in a solid solvent.
When there is a maximum amount of solute that can dissolve in a given amount of solvent
at a certain temperature, this is called solubility of the solute.
Another basis for classifying solutions is the amount of solute dissolved in the given solvent.
The solution that contains the maximum amount of solute dissolved by a given amount of
, Science Grade 7
Name: ____________________________________
Activity 1: What is the Evidence that a Solution is Saturated?
After performing the activity, you will be able to:
1. determine how much solid solute dissolves in a given volume of water;
2. describe the appearance of a saturated solution.
Materials needed CAUTION: Use carefully the following
6 teaspoons sugar laboratory instruments/kitchen
1 cup of water materials to avoid damage and
1 measuring cup ( 1 cup capacity) accident during the conduct of activity
1 measuring spoon (½ tsp capacity)
2 small clear, transparent bottles
2 stirrers/ spoon
Procedure
1. Pour 20 mL ( approximately 2 tablespoons) of water in a small transparent bottle.
Add ½ teaspoon of sugar and stir.
Q1. What is the appearance of the solutions? Write your observations.
2. To the sugar solution in step #1, add ½ teaspoon sugar, a small portion at a
time and stir the solution to dissolve the sugar. At this point, you have added
1 teaspoon sugar.
3. Add ½ teaspoon of sugar to the sugar solution in step #2 and stir the solution.
At this point, you have added one and ½ teaspoons of sugar.
4. Continue adding ½ teaspoon sugar to the same cup until the added sugar no
longer dissolves.
Q2. How many teaspoons of sugar have you added until the sugar no
longer dissolves? _________ Teaspoons
Note: In this step, you will observe that there is already excess sugar
which did not dissolve.
Q3. So, how many teaspoons of sugar dissolved completely in 20 mL of
water? ____________ Teaspoons
Note: This is now the maximum amount of sugar that will completely
dissolve in 20 mL of water.
Activity 2: SOLUTE OR SOLVENT?
Directions: Identify the solute and the solvent in the given solutions below.
Solution Solute Solvent
Salt water
