By : Niar Rehulina Perangin angin, M.Pd

ACIDS and BASES

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

Has a bitter taste

Can change the color of certain dyes

Has a slimy or soapy feeling

Can neutralize acids

Has a sour tasteCan change the color

of certain dyesCan react with

certain metals, to produce hydrogen gasCan neutralize bases

The CharacteristicsAcids Bases

Arrhenius Concept

Bronsted-Lowry Concept

Lewis Concept

Arrhenius Concept Increases the

concentration of

hydronium ions

(H3O+)

Increase the

concentration of

hydroxide ion,

(OH-)

Back

Acid

Base

H Cl + H2O H3 O++ Cl-

NH3 + H2O NH4- + OH-

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

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

QUIZ

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

Which ones of this statement below is the characteristics of acids…..

EXCELLENT

THANK YOU

FOR YOUR ATTENTION