1. Notes

2. The student will:
Distinguish between an acid
and a base

3. The student will:
Recognize indicators that
can be used to help identify
acids and bases

4. The student will:
Use 4 different indicators to
identify whether a substance
is an acid or base

5. The student will:
Identify “pH”
Describe what pH is and how
it has a meaningful effect on
us

6. Acid Base
Indicator pH
pH Scale
Chemical Property Reactivity
Combustibility Flammability

7. Let’s Go!

8. A group of compounds
which contain hydrogen
and produce Hydrogen
Ions (H+
) when dissolved
in water.

9. Acids taste sour,
conduct electricity
and corrode metals.

10. Acid compounds’ chemical formulas
always begin with an H (a single
Hydrogen atom)
 i.e. (HCl = Hydrochloric Acid)

11. A group of compounds
that produce
hydroxide ions in a
solution.

12. Bases taste bitter, feel
slippery, corrode
metals and conduct
electricity.

13. Base compounds
always end with an
OH
 (NH4OH) = Ammonia

14. A tool used to help
identify wether a
substance is an acid or
a base
It indicates acid or base
by changing color or
displaying a digital
reading

15. A symbol used to
represent the percent
of the Hydrogen Ion
(Acid Level) in a
substance.
▪Ranges from 1 (Acid)
– 15 (Base)

16. ▪ One tool used with indicators that is
used to indicate the strength of an
acid or a base.

17. ▪ A value of 1 indicates a strong acid
▪ Battery Acid (Sulfuric Acid; H2S O4)
▪ A value of 7 represents a neutral
(our blood and saliva are a pH of 7)
▪ A value of 15 represents a strong
base
▪ Oven Cleaner, Draino, Ammonia, Soap

18. A property of matter
which describes the
ability of a substance
to create a new
substance during a
chemical reaction

19. Examples:
▪Reactivity
▪Combustibility
▪Flammability

20. The tendency of a
substance to undergo
a chemical change
either by itself or when
mixed with another
substance.
 http://www.youtube.com/watch?v=gRuoWkOlaHM
 http://www.youtube.com/watch?v=uixxJtJPVXk

21. Describes if a
substance is
capable of igniting.
I.e., Gas vapors,
Natural Gas

22. Describes if a
substance is
capable of
burning
i.e., Cloth,
Rags, Paper,
Wood etc.

23. A chemical
reaction between
an acid and a base
which produces
water and a group
of compounds
called “ salts”.

24. Now let’s tie it all
together!

25. Acids and Bases are all around us
 Acids can be strong or weak having a
pH value of 1 – 6, 1 being the
strongest, 6 being the weakest

26. Strong acids can burn you; weak
acids don’t
 1 – HCl (Hydrochloric Acid) Strong
6 – Coffee Weak

27. Acids and Bases are all around us
 Bases can be strong or weak having a
pH value ranges between 8 – 15, 8
being the weakest and 15 the
strongest

28. Strong bases can burn you; weak
Bases wont
A value of 8 – 9 is weak
Hand soap, Detergent, Ammonia
A value of 13 - 15 is strong.
 Oven Cleaner, Drain Cleaner

29. Something that is “Neutral” has a
pH of 7. (Our bodies are neutral.)
When an acid and a base are
combined a process called
“Neutralization” occurs.

30.  During neutralization the reactants
(acid + base) combine to form two
products..
Water H2O
A compound called a “Salt”

31. Thank you for your
cooperation!

32. Copy and Answer
these!
What is “pH” and how is
it measured?
What is an acid?