Notes
SPI 0807.9.12
Acids and Bases
Date
SPI 0807.9.12.A
Acids
Tennessee SPI Objective:
Instructions
for Students
Identify the
basic properties
of acids…
1) Make sure you view this presentation in slideshow mode.
Essential
Question(s)
2) You can find instructions
about
how to do this by doing a
1) What
are or
the
properties
of acids?
Google
search
bybasic
searching
YouTube.
3)
it in slideshow
the right-arrow
2)After
Howyou
dohave
I recognize
acidsmode,
usingpress
the pH
scale?
keyboard
button
to advance
through
the presentation.
3) How can
I use
indicators
to determine
if a substance
4) If you need help, please communicate with your teacher.
is an acid?
Check for Understanding
Determine whether a substance is an acid or a base
by its reaction to an indicator.
Notes
SPI 0807.9.12
Acids and Bases
Acids
Acid Properties
An acid is any compound that increases the number of
positive hydronium ions when dissolved in water.
Acids have a sour flavor The sour taste of lemons, limes,
and other citrus fruits is a result of citric acid.
Acids neutralize bases and bases neutralize acids
Acids conduct electricity and are used in batteries
Notes
SPI 0807.9.12
Acids and Bases
Memory Trick
Acids and Hydronium
Acids
Acids are found in foods you like such as oranges, soft
drinks, and tomatoes (think pizza and spaghetti).
hydroniYUM because
 So think of acids with
acids go with hydronium ions.
 Acids Change Colors in Indicators
Examples of Indicators:
litmus paper
cabbage juice
phenolphthalein
This flask contains
bromothymol blue.
bromothymol blue
When acid is added, the
color changes to yellow.
Litmus paper- is a common acid/base indicator
blue litmus paper turns red in acids
Review
SPI 0807.9.12
Acids
Questions
Acids and Bases
Fill in the blanks using the following words
red, hydronium, acids, compound, sour
compound
1) An acid is any ____________that
increases the number of
_____________ions.
hydronium
2) Acids have a _______
sour flavor.
3) _________
Acids neutralize bases.
red in acids.
4) Blue litmus paper turns ______
Acids
Notes
SPI 0807.9.12
Acids and Bases
Acids
Acid Properties-Continued
Acids react with some metals
Acids react with some metals to produce hydrogen gas.
Example: hydrochloric acid with zinc metal
Acids conduct electric current
Example: found in flashlight batteries and/or car batteries
Review
Questions
SPI 0807.9.12
Acids and Bases
Acids
Fill in the blanks using the following words
ions, electricity, metals
1) Acids react with some ________.
metals
2) _____
ions are formed during chemical reactions when
electrons are lost or gained
3) Acids conduct ___________.
electricity
BONUS QUESTION
How is an ion different from an atom?
 Ions are positive or negative, but atoms have no charge.
 Otherwise, atoms and ions look nearly identical
The pH scale
(pH=power or potential of hydrogen)
 pH scale: measures acidity or basicity (A.K.A. Alkalinity).
(tells you how strong or weak acids and bases are)
 Acids are 0 to 6.9 on the pH scale
 7 is neutral (pure water is 7)
Acids are 0 to 6.9
9
More About the pH scale
 Again…acids are 0 to 6.9 on the pH scale
 The lower the number…the stronger the acid
 In other words, an acid with a pH of 1 is stronger than an acid
with a pH of 5
pH 1 is stronger than pH 5
10
The pH Scale can be displayed four different ways
Ex: Vertical-0 at top and 14 at bottom
Ex: Vertical-14 at top and 0 at bottom
Ex: Horizontal-0 on the left with 14 on the right
Ex: Horizontal-14 on the left with 0 on the right
Yet the pH ranges stay the same.
(0 to 6.9 for acids and 7.1 to 14 for bases)
pH Scale
pH Scale
pH Scale
11
pH Scale
Review
Questions
SPI 0807.9.12
Acids and Bases
Acids
Fill in the blanks using the following words
0 to 6.9, True, seven, vinegar, pH scale
1) A __________
pH scale tells you how strong or weak an acid or
base is.
2) On a pH scale, the range for acids is ________.
0 to 6.9
seven
3) Neutral substances have a pH of ________?
4) (True or False): An acid with a pH of 2 is stronger than
an acid with a pH of 4. ___________.
True
5) Which substance has greater acidity, pure water or
vinegar? __________.
vinegar
Notes
SPI 0807.9.12
Acids and Bases
Acids
F.Y.I.---How are acids used?
Sulfuric acid is (most common) used to make paper, paint,
detergents, fertilizers and many other products like batteries
 Nitric acid is used to make fertilizers, rubber, and plastics.
 Hydrochloric acid is used to separate metal from their ores. It
is also used in swimming pools and in your stomach.
Citric acid and ascorbic acid (Vitamin C) are found in orange
juice, grapefruit juice, and tomatoes.
 Carbonic acid and phosphoric acid are in soft drinks.
Video
Links
SPI 0807.9.12
Acids and Bases
Link 01:Universal Indicator
Link 02:Coke can in acid
Link 03:Cheeseburger in Hydrochloric Acid
Science
Questions
SPI 0807.9.12
Acids and Bases
Acids
Sample: Here is a question you might see on a quiz or test.
SPI 0807.9.12
Acids
Questions
Acids and Bases
Sample: Here is a question you might see on a quiz or test.
Questions
SPI 0807.9.12
Acids and Bases
Acids
Sample: Here is a question you might see on a quiz or test.
Sample: Here is a question
might see on a quiz or test.
SPI you
0807.9.12
Questions
Acids and Bases
Acids
Questions
SPI 0807.9.12
Acids and Bases
Acids
Sample: Here is a question you might see on a quiz or test.