1. ACIDS and
BASES
By : Niar Rehulina Perangin angin, M.Pd

2. You Should be able to:

State some of the important
characteristics of acids and bases

Difine the terms acid and base

Discuss the concept of the ionization

3. The Characteristics
Acids
Bases
 Has a sour taste
 Has a bitter taste
 Can change the color
 Can change the
of certain dyes
color of certain dyes
certain metals, to
 Has a slimy or soapy
produce hydrogen
feeling
gas
 Can neutralize bases  Can neutralize acids
 Can react with

4.  Arrhenius
Concept
 Bronsted-Lowry
 Lewis
Concept
Concept

5. Arrhenius Concept


Increases the
concentration of
hydronium ions
(H3O+)
Increase the
concentration of
hydroxide ion,
(OH-)

Acid
H Cl + H2 O

H3 O+ + Cl-
Base
NH3 + H2 O
NH4- + OH-
Back

6. Bronsted-Lowry Concept
An Acid is a species
which can donate a
proton (a hydrogen
ion, H+) to a proton
acceptor
A base is a species
which can accept
a proton from a
proton donor

7. Lewis Concept

An acid is a
species that can
accept a pair of
electrons

A base is a species
that can donate a
pair of electrons

8. QUIZ

9. Which ones of this statement below is
the characteristics of acids…..
a. The taste is Bitter
b. Change of the red Litmus becomes blue
c. Can react with certain metals
d. Has a slimy or soapy feeling
e. The example is NaOH

10. EXCELLENT

11. THANK YOU
FOR YOUR ATTENTION