Understanding Chemical Substances in Household and Personal Care Products: Functions and Safety
Explore common chemical substances in household and personal care products, their functions, and the importance of reading labels for safe and informed use.
LEARNING
OBJECTIVES
AT THE ENDOF THE LESSON, THE LEARNERS WILL
BE ABLE TO
1. Identify common chemical substances
found in household and personal care
products and explain their functions based
on information found on product labels.
2 Construct a table classifying chemical
substances and their functions using
information gathered from product labels.
3 Demonstrate appreciation for the
importance of reading product labels
before using household and personal care
products.
CHEMISTRY IS EVERYWHERE
Chemicalsare present in almost everything we
use daily. These substances are added because
they perform specific functions that make
products useful, effective, and safe when used
properly.
CHEMICALS
An element orcompound with a specific
composition and purpose.
Examples:
• Water (H₂O)
• Salt (NaCl)
• Baking Soda (NaHCO₃)
A product may contain many
chemical substances because each
ingredient performs a different
role.
Not all chemicals are harmful.
Many chemicals improve our
health, hygiene, and quality of life.
WHAT IS A CHEMICAL SUBSTANCE?
Chemical Substance
18.
WHAT IS ACHEMICAL SUBSTANCE?
An element or compound with a specific
composition and purpose.
Chemical Substance
Examples:
• Water (H₂O)
• Salt (NaCl)
• Baking Soda (NaHCO₃)
19.
TOOTHPASTE – MORETHAN JUST
CLEANING TEETH
Toothpaste
Different ingredients work together to protect teeth and improve oral health.
BLEACH – POWERFULBUT REQUIRES CARE
Benefits
✔ Disinfects surfaces
✔ Removes stains
✔ Prevents disease-causing
microorganisms
bleach
Reminder Must be used according to instructions.
⚠
24.
BAKING POWDER –CHEMISTRY IN
COOKING
What Happens?
Baking Powder + Heat Carbon Dioxide Gas Dough Rises
→ →
bleach
Chemistry helps create the texture of cakes, bread, and pastries.
25.
CONNECTING TO PRIORKNOWLEDGE
Characteristics
✔ Formed through transfer of electrons
✔ Usually contain metals and nonmetals
Ionic Compounds
• Sodium Fluoride (NaF)
• Sodium Hypochlorite (NaClO)
• Sodium Bicarbonate
(NaHCO₃)
26.
CONNECTING TO PRIORKNOWLEDGE
✔ Formed through sharing of electrons
✔ Usually composed of nonmetals
Covalent Compounds
The bonding of atoms affects how substances behave and how they are used in products.
• Water (H₂O)
• Glycerin (C₃H₈O₃)
27.
WHY DO PRODUCTSCONTAIN MANY
INGREDIENTS?
A product works effectively because different ingredients work together.
Each ingredient has a specific role:
28.
KEY TAKEAWAY
• Householdproducts contain chemical substances.
• Each chemical has a specific function.
• Chemicals improve health, hygiene, cleaning, and food
preparation.
• Understanding ingredients helps consumers make informed
choices.
GUIDE QUESTIONS
If allchemical
substances were
removed from
household products,
how would daily life be
affected?
Many products would lose their
effectiveness because chemicals
provide cleaning, disinfecting,
preserving, and protective
functions.
ANSWER
31.
GUIDE QUESTIONS
Why shouldpeople
learn the function of
ingredients instead of
assuming that
chemicals are harmful?
Understanding the purpose of
ingredients promotes informed
decision-making and helps people
recognize that many chemicals
provide important benefits when
used correctly.
ANSWER
GENERALIZATION
natural healthy skin
Whatnew chemical
substance did you learn
today?
Why should consumers
read product labels?
Chemical substances found in household and personal care
products perform specific functions that make products effective.
Understanding these substances helps consumers use products
safely and responsibly
ASSESMENT
natural healthy skin
ExitTicket (Individual)
Answer briefly:
1.Identify one chemical substance found in a
household product.
2.What is its function?
3.Why is reading product labels important?