SCH 4C1
4.7 Acids and Bases
General properties
ACIDS
Arrhenius Acids and Bases
 Acids produce H+ in aqueous solutions
BASES

Bases produce OH- in aqueous solutions

LiOH  Li+ + OH-
Dissociation
Acids and Bases dissociate or ionize in water
 (Break down into ions)
For example:
 HCl  H+ + ClYou try!
H3PO3 
Al(OH)3 
Strong & Weak Acids

A strong acid will _________________________ in water

A weak acid will _________________________ in water
Strength of Acids & Bases

Weak acids have fewer molecules _______________ and thus the number of hydrogen ions is _______

The __________ hydrogen ions there are, the __________ the pH value.

Weak bases have fewer molecules _______________ and thus the number of hydroxide ions is ______

The __________ hydroxide ions there are, the __________ the pH value.
SCH 4C1
pH & Acidity
Neutral – pH __________

Basic – pH __________
Acidic – pH __________
A pH change of 1 unit represents a _______________ change in how basic or acidic a solution is
Reaction of an Acid and a Base
When you mix an acid and a base, you create water and a salt (ionic compound)
 This is a double displacement reaction
For example:
HCl + NaOH 
Describe the solution in each of the following as:
1) acid, 2) base, or 3) neutral.
A. ___ soda
B. ___ soap
C. ___ coffee
D. ___ wine
E. ___ water
F. ___ grapefruit
Identify each as characteristic of an
A) acid or B) base
____ 1.
____ 2.
____ 3.
____ 4.
____ 5.
Sour taste
Produces OH- in aqueous solutions
Chalky taste
Is an electrolyte
Produces H+ in aqueous solutions