This document provides an overview of a science lesson on factors affecting rates of chemical reactions. It begins with defining chemical reactions and listing some common examples. It then discusses factors that can increase or decrease reaction rates such as temperature, concentration, surface area, catalysts, and inhibitors. The document provides examples of chemical reactions and their importance. It also discusses chemicals used in industries and their applications. Hands-on activities are included to reinforce the concepts as well as a concluding task and assessment rubric.

1. SCIENCE 10
QUARTER 4
Factors Affecting Rates of Chemical
Reactions
Prepared by:
Mary Rose P. Fajardo, RN, LPT
Science Teacher

2. WHAT IS A
CHEMICAL
CHANGE?
WHAT ARE THE
EVIDENCES OF
CHEMICAL
REACTIONS?
REVIEW

3. 1. BURNING OF
PAPER
2. WASHING OF
PLATES
3. LEAVES IN A
COMPOST PIT
4. RIPENING OF
FRUITS
CLASSIFY IF IT IS PHYSICAL
OR CHEMICAL CHANGE?
5. LEFTOVER FOODS
IN THE TRASH BINS

4. WHAT DO YOU
KNOW???

5. LET’S PLAY A GAME!!
https://create.kahoot.it/sha
re/chemical-
reactions/26b8f434-9825-
4748-9aff-a8b08a287c34
■ kahoot.it
■ Game PIN:

7. INTRODUCTION
Lesson 1
Factors that Affect the
Rates of Chemical
Reactions

8. BACKGROUND
WHAT IS A
CHEMICAL
REACTION?
Is a process in which one or
more substances, the
reactants, are chemically
converted to one or more
different substances, the
products.
PHYSICAL OR CHEMICAL
CHANGES RELATED TO
ENVIRONMENTAL ISSUES
 Plastic decomposition
 Global warming
 Effects of acid rain
 Oil spills
EXAMPLE
Burning of wood, burning
fuels, smelting iron, making
glass and pottery, brewing
beer, and making wine and
cheese.
MOST IMPORTANT
CHEMICAL REACTIONS
 Synthesis of ammonia, Combustion of
hydrogen/electrolysis of water
 Combustion of methane(hydrocarbons)
 Photosynthesis, synthesis of sulfuric acid,
equilibrium of carbonic acid and CO2,
iron rusting of iron and biological
formation of calcium carbonate

9. DIRECTIONS: Choose from the pool of words below that best
describe the photos/images presented. Write your answers in your
notebook/separate sheet of paper.
Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

10. Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

11. Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

12. Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

13. Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

14. Firecracker explodes paper burns
Foaming antacid tablet fizzes in water food spoil
Ring of scum forms around a bath tub iron rusts

15.  Vinegar
Baking Soda
 Beaker or clear glass/
bottle
Thermometer
Materials:
“Vinegar and Baking Soda
Reaction”
EXPERIMENT TIME!!!

17. METHODS
1. Pour 20 ml of vinegar
in a beaker/clear
glass/bottle.
3. Add a tablespoon of
baking soda to the
beaker/clear glass/bottle.
2. Get the temperature
of vinegar using a
thermometer.

18. OBSERVATION???
MATERIALS
VINEGAR
Before Reaction???
During Reaction???
BAKING SODA
Before Reaction???
During Reaction???

19. Guide
Questions:

20. Observe what happens
to the flame.
What do you observe in
the mixture?
1. a. b.
Place a lighted
match on top of
a beaker/clear
bottle near the
bubbles.

21. Factors that Affect the
Rates of Chemical
Reactions

22. FACTORS TO CONSIDER
An increase in temperature
results in an increase in the
kinetic energy of the reacting
particles.
A catalyst is a substance that
enhances the rate of the chemical
reaction without itself undergoing
any chemical change.
Inhibitors are substances that
decrease the rate of a chemical
reaction.
Catalysts and
Inhibitors
e.g. Phosporus, burns and ignites
rapidly in the air; Sodium reacts
violently with water; Acid reacts
vigorously with active metals
producing hydrogen gas.
Nature of the
Reacting
Substances
Effect of
Temperature
Increasing surface area
increases the rate of the
chemical reaction.
Surface Area
An increase in the
concentration of the reactant
means that there will be more
particles colliding with each
other in a given time interval,
thereby increasing the chances
that a chemical reaction
occurs.
Concentration of
the Reactants
An increase in the pressure of
gas brings the reacting
particles closer to each other,
thus increasing the rate of
collisions.
Effect of Pressure
1.
2.
3.
4.
5.
6.

23. SOME CHEMICAL
REACTIONS
Chemical reactions always exist around us and
within our bodies. They occur simultaneously
without our notice. The decay of food, growth in
plants, and digestion of foods are only some of
these reactions.

24. FOOD SPOILAGE

26. BIODEGRADABLE WASTE

27. REASONS WHY CHEMICAL
REACTIONS ARE IMPORTANT
Chemical
reactions are
how new
forms of
matter are
made.
Chemical reactions
helps us understand
the properties of
matter.
By obsserving
chemical
reactions, we
can understand
and explain how
natural world
works.
Exciting
and
entertaining
Helps us
solve crimes
and explain
mysteries.
1 3 5
4
2

28. REASONS WHY CHEMICAL
REACTIONS ARE IMPORTANT
We are able
to identify
and describe
other planets.
Fire, the most
important discovery
made by human
beings, is simply a
chemical reaction.
Without
chemical
reactions, noting
would ever
change.
6 8
7

29. IMPORTANT FACTORS
AFFECTING THE RATE OF
CHEMICAL REACTIONS TO
INDUSTRY

30. CATEGORIES:
2. SPECIALTY
CHEMICALS
■ petrochemicals
■ polymers
■ Basic inorganic
Used directly by the final users
– the public.
3. CONSUMER
CHEMICALS
1. BASIC CHEMICALS
Chemical products which
provide a wide variety of effects
on which many industry
sectors rely.

31. EXAMPLES OF CHEMICALS AND
THEIR INDUSTRIAL APPLICATIONS
USES
COMMON NAME OF THE
CHEMICAL
MOLECULAR FORMULA
& IUPAC NAME
Baking powder NaHCO3; Sodium bicarbonate - For baking and cooking, it
releases CO in reaction with
other ingredients.
Soap Esters - For bathing and washing
clothes
detergent Sodium sulphate, sodium
hydroxide & phosphate
compounds
- For washing clothes
Toothpaste Calcium carbonate, sodium
fluoride
- For cleaning teeth
salt NaCl; Sodium Chloride - Seasoning for cooking; also as
a preservative

32. EXAMPLES OF CHEMICALS AND
THEIR INDUSTRIAL APPLICATIONS
USES
COMMON NAME OF THE
CHEMICAL
MOLECULAR FORMULA
& IUPAC NAME
Vinegar Acetic acid - As a preservative and for
seasoning foods; use for various
household cleaning purposes
Graphite Carbon - In pencils
Alcohol Ethanol (C2H6O) - In alcoholic drinks
Bleaching powder NaOCl - Commonly used domestic
bleach; use for cleaning
purposes
Sugar Sucrose; C12H22C11 - In cooking, as a sweetener

33. EXAMPLES OF CHEMICALS AND
THEIR INDUSTRIAL APPLICATIONS
USES
COMMON NAME OF THE
CHEMICAL
MOLECULAR FORMULA
& IUPAC NAME
Aspirin Acetyl salicylic acid, C9H8C4 - In various medicines
Mouthwash H2O2, Hydrogen peroxide - For personal hygiene
Caustic Soda NaOH, sodium hydroxide - Highly corrosive alkali which is
used for cleaning, unblocking
sinks, drains and toilets
Mothballs C6H4C12, dichlorobenzene - Have a strong pungent smell
Chalk CaCO3, calcium carbonate - Used as blackboard chalk,
pavement, gymnastics and rock
climbing, and sometimes in
toothpaste

34. Directions: Match the industrial applications of the chemicals. Write your
answers in a separate sheet of paper.
ACTIVITY 1
Column A Column B
1. Highly corrosive
alkali which is used
for cleaning,
unblocking a sink
a.Toothpaste
b. Bleaching powder
drains and toilets
2. Have a strong pungent smell c. Caustic Soda
3. As preservatives for seasoning foods
and utilized for various household
cleaning purpose.
d. Baking Soda
e. Mothballs
f. Salt
4. For cleaning teeth. g. Soap
5. In cooking, serves as a sweetener h. Sugar
6. Commonly used bleach and for
cleaning purposes.
i. Mouthwash
j. Vinegar
7. For baking and cooking k. Graphite
8. For bathing and washing clothes
9. For personal hygiene
10. Seasoning for cooking and as a
preservative

35. ACTIVITY 2
Direction: Use numbers to reveal the hidden
words in the English alphabet, code the following
number words. Please refer to the codes below.
Write your answers on a separate sheet of paper.
A-1 B-2 C-3 D-4 E-5 F-6 G-7 H-8 I-9 J-10 K-11 L-12 M-13 N-14
O-15 P-16 Q-17 R-18 S-19 T-20 U-21 V-22 W-23 X-24 Y-25 Z-26
1. Chemicals derived from oil.
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
16 15 20 18 15 3 8 5 13 9 3 1 12 19

36. ACTIVITY 2
A-1 B-2 C-3 D-4 E-5 F-6 G-7 H-8 I-9 J-10 K-11 L-12 M-13 N-14
O-15 P-16 Q-17 R-18 S-19 T-20 U-21 V-22 W-23 X-24 Y-25 Z-26
2. Low cost of chemicals used in agriculture.
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
2 1 19 9 3 9 14 15 18 7 1 14 9 3 19
3. Consists of a large variety of chemicals used for crop
protection, paints and inks, colorants.
___ ___ ___ ___ ___ ___ ___ ___ ___ ___
19 16 5 3 9 1 12 9 20 25
___ ___ ___ ___ ___ ___ ___ ___ ___
3 8 5 13 9 3 1 12 19

37. ACTIVITY 2
A-1 B-2 C-3 D-4 E-5 F-6 G-7 H-8 I-9 J-10 K-11 L-12 M-13 N-14
O-15 P-16 Q-17 R-18 S-19 T-20 U-21 V-22 W-23 X-24 Y-25 Z-26
4. The most user-friendly, effective, and environmentally safe products.
___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___ ___
3 15 14 19 21 13 5 18 3 8 5 13 9 3 1 12 19

38. TASK:
Give at least one example
of each type of chemical
reaction that you can
observe in your
home/community.

39. TASK:
Make a poster about the
factors affecting chemical
reactions. Choose only
one application of the
reactions in the following
industries. Use a bond
paper for this activity.
 Food preservation and
material production
 Pollution
 Fire control
 Corrosion
***RUBRICS:
USE OF TIME = 5 POINTS
PICTURES/GRAPHICS = 5 POINTS
REQUIRED ELEMENTS = 5 POINTS
VISUAL CLARITY AND APPEAL = 5 POINTS
TOTAL 20 POINTS

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including icons by Flaticon, and infographics & images by Freepik.
Please keep this slide for attribution.
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YOU!!!

42. CONCLUSIONS

43. CONCLUSIONS

44. HEALTH ICONS

45. HEALTH ICONS

46. ALTERNATIVE RESOURCES

47. Did you like the resources on this template? Get them for free at our other
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ICONS
■ Pack Medical 146
■ Pack Scientific study
■ Pack Health 42
ILLUSTRATIONS
■ Red molecules background
■ Pack of atoms structures
■ Set of molecular components
PHOTOS
■ Doctor analyzing with a microscope
RESOURCES