7. Performance Standard:
The learners shall be able to
prepare different
concentrations of mixtures
according to uses and
availability of materials.
8. Learning Areas:
The learners should be able to express
concentrations of solutions quantitatively
by preparing different concentrations of
mixtures according to uses and availability
of materials.
(S7MT-Id-3)
Express concentrations of solutions
quantitatively in making latik.
19. “There is a maximum amount of
solute that can be dissolved in a given
solvent at a certain temperature.”
20.
21.
22. “There is a maximum amount of
solute that can be dissolved in a given
solvent at a certain temperature.”
23. Solubility of Solution
1. Unsaturated solution -
contains less solute than a
maximum amount it can
dissolve at a given
temperature.
24. Solubility of Solution
2. Saturated solution - A
solution that contains the
maximum amount of solute
dissolved by a given amount
of solvent.
25. Solubility of Solution
3. Supersaturated solution -
when a solution contains
greater amount of solute,
to the extent that the
added solute is
no longer dissolved.
26. Coco jam or latik
One must know the amount of sugar to be
dissolved in a given amount of coconut milk at
a given temperature.
27. Coco jam or latik
How to make latik?
What are some common ingredients in making latik?
What foods are best when eaten with latik?
28.
29.
30.
31.
32.
33. Concentration of solution can be expressed
quantitatively either percent by mass or percent by
volume.
Percent by Volume
volume of solute
% by volume = --------------------- X 100
volume of solution
Ex.
volume of solute = 1 mL
volume of solution = 4 mL
1mL
% by volume = ------------- x 100 = 25%
4 mL
Percent by Mass
mass of solute
% by mass = ---------------------- X 100
mass of solution
Ex.
Mass of solute = 1gram
Mass solution = 4 grams
1gram
% by mass = ------------- x 100 = 25%
4 grams
34. Examples:
1. Ms. Ligaya is making a latik. She uses
300mL of sugar and 500mL of coconut milk.
What is the total volume of her latik solution?
Ans. 800mL
Given:
Volume of solute = 300mL
Volume of solvent = 500mL
Volume of solution = 800mL
35. 2. What is the percentage composition by
volume of the solution in number 1?
Given:
Volume of solute = 300mL
Volume of solvent = 500mL
Volume of Solution = 800mL
Required: % by volume
36. Given:
Volume of solute = 300mL
Volume of solvent = 500mL
Volume of solution = 800mL
Required: % by volume
Solution:
volume of solute
% by volume = -------------------------- X 100
volume of solution
37. Solution:
volume of solute
% by volume = -------------------------- X 100
volume of solution
substitute the value…
300mL
% by volume = ----------- X 100 = 37.5%
800mL
38. 2. What is the percentage
composition by volume of the
solution in number 1?
Ans. 37.5%
39. What is the percentage by mass
of a salt solution prepared by
dissolving 4g of salt in 36g of
water?
mass of solute
% by mass = ---------------------- X 100
mass of solution
40. What is the percentage by mass of a salt
solution prepared by dissolving 4g of salt in
36g of water?
41. Why do we need to know
about concentrations of
solution?
46. Matching Type
Match column A with column B.
A B
1. Unsaturated a. Component of solution in lesser amount
2. Saturated b. Component of solution in greater
3. Supersaturated amount
4. Solute c. solute is completely dissolve
5. Solvent d. small amount of solute is observed
e. large amount of solute is no longer
dissolved
47. II. Problem Solving
1. What is the percentage composition of
solution in the following: 5g sucrose
(sugar) in 90g water?
2. 250mL of sugar is dissolved in 500mL
coconut milk. What is the volume of
the solution? What is its percentage
composition?
48. Assignment
In a chemistry class, Rina
prepared a solution by mixing
25 g of sugar in 80 g of water.
What are the concentrations
of the solute and solvent in
percent by mass?