very very ver very good Acid and Base PPT.ppt

Acids & Bases
They are everywhere..
In your food
In your house
EVEN IN YOU!!!!!
Intro Video up to 1:10

Where do we find Acids and Bases?
Where do we find Acids and Bases?
DO NOT COPY THIS SLIDE
DO NOT COPY THIS SLIDE
 They are compounds...
They are compounds...
that are fundamental to the functioning of
that are fundamental to the functioning of
our world. – we need them!
our world. – we need them!
 They are essential to Life;
They are essential to Life;
 They are responsible for many, many
They are responsible for many, many
processes in nature;
processes in nature;
 They are important in may products and
They are important in may products and
processes we have come to expect in our
processes we have come to expect in our
daily lives.
daily lives.
Continue Video to 3:15

What is an acid?
What is an acid?
Copy these notes.
Copy these notes.
 An acid is a solution that has an
An acid is a solution that has an
excess of Hydrogen (H+ ions).
excess of Hydrogen (H+ ions).
 The more H+ ions, the more
The more H+ ions, the more
acidic the solution.
acidic the solution.

Properties of an Acid
 Tastes Sour
 Conducts Electricity
 Corrosive; (they break
down certain substances.
Many acids can corrode
fabric, skin,and paper).
 Some acids react
strongly with metals.
 Turns blue litmus
Turns blue litmus
paper red
paper red

Uses of Acids
 Acetic Acid = Vinegar
 Citric Acid = lemons, limes, &
oranges. It is in many sour
candies such as lemonhead &
sour patch.
 Ascorbic acid = Vitamin C
which your body needs to
function.
 Sulfuric acid is used in the
production of fertilizers, steel,
paints, and plastics.
 Car batteries

What is a base?
 A base is a solution that has
an excess of OH- ions.
 Another word for base is
alkali.
 Bases are substances
that can accept
hydrogen ions
 H + OH = ________

Properties of a Base
 Feel Slippery
 Taste Bitter
 Corrosive
 Can conduct electricity.
(Think alkaline batteries.)
 Do not react with metals.
 Turns red litmus
paper blue.

Uses of Bases
 Bases give soaps, ammonia,
and many other cleaning
products
 The OH- ions interact strongly
with certain substances, such
as dirt and grease.
 Chalk and oven cleaner are
examples of familiar products
that contain bases.
 Your blood is a basic solution.
Video to 12:37 pH scale

So how can we tell which is an
So how can we tell which is an
acid and which is a base?
acid and which is a base?
 Ideas?
Video to 12:37

pH Scale
 pH is a measure of how acidic or basic a
solution is.
• The pH scale ranges from 0 to 14.
 Acidic solutions have pH values
Acidic solutions have pH values below 7
below 7
 A solution with a pH of 0 is very acidic.
 A solution with a pH of 7 is neutral.
• Pure water has a pH of 7.
Pure water has a pH of 7.
• Basic solutions have pH values above 7.
Basic solutions have pH values above 7.

pH Scale
• A change of 1 pH unit represents a
tenfold change in the acidity of the
solution. (X 10)
• For example, if one solution has a pH of 1
and a second solution has a pH of 2, the
first solution is not twice as acidic as the
second—it is ten times more acidic.

Acid – Base Reactions
 A reaction between an
acid and a base is
called neutralization.
An acid-base mixture
is not as acidic or
basic as the individual
starting solutions.

Acid – Base reactions
 Each salt listed in this
table can be formed by
the reaction between an
acid and a base.

LAB TIME
 You will need to understand how we use the
TWO Litmus papers properly before proceeding
with your lab.
Lab Sheet

Acids and Bases in Nature @ 15:20
Acids and Bases are constantly at work
Acids and Bases are constantly at work
interacting with each other; otherwise all
interacting with each other; otherwise all
our water would be acidic….No? Explain…
our water would be acidic….No? Explain…
After viewing the final episode, answer these
After viewing the final episode, answer these
Qs:
Qs:
1. How does pH affect plant growth and
1. How does pH affect plant growth and
gardeners gardens?
gardeners gardens?
2. How does pH affect farmers’ crops?
2. How does pH affect farmers’ crops?
3. What is the cause of acid rain?
3. What is the cause of acid rain?
4. How does acid rain affect living and non-
4. How does acid rain affect living and non-
living things?
living things?

very very ver very good Acid and Base PPT.ppt

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