1. Chapter 19: Acids And Bases

2. Class question Where can acids be found? Where can bases be found?
Sodas
Stomach
Vinegar
Citrus fruits
Where can bases be found?
Soap
Drano
Antacid tablets
Windex
detergent

3. Properties of Acids Taste sour React with bases
Litmus paper test – turn blue litmus paper red
Electrolytic – conduct electricity

4. Properties of Bases Taste bitter Feels slippery React with acids
Synonym Alert! Alkali or Alkaline = Base
Taste bitter
Feels slippery
React with acids
Litmus paper test – turn red litmus paper blue
Electrolytic - conduct electricity

5. Self Ionization-dissociation of Water
simplified version
H2O 
H+ + OH-

6. “Dissociation” of water

7. Arrhenius Model of Acids and Bases
Arrhenius Acids
Definition: contains H+ and ionizes to form H+
Examples
HCl 
HNO3 
makes
solution
ACIDIC
H+ + Cl-
H+ + NO3-

8. Arrhenius Model of Acids and Bases
Arrhenius Bases
Definition:
contain OH- and ionizes to produce OH- ions
Examples
NaOH 
Ca(OH)2 
makes
solution
BASIC
Na+ + OH-
Ca OH-

9. Bronsted-Lowry Model Bronsted-Lowry Acid Bronsted-Lowry Base
Definition: proton/H+ donor
can give H+ to another species
Bronsted-Lowry Base
Definition: proton/H+ acceptor
can take H+ from another species

10. Bronsted-Lowry Model REMEMBER!!!! REMEMBER!!!!
acids donate, bases accept protons
Ashley does boys always

11. Bronsted-Lowry Model Examples HCl + H2O  Cl- + H3O+
What is happening here?
Acid (donates proton)
Base (accepts proton)
Which is the acid? base?

12. Bronsted-Lowry Model Examples NH3 + H2O  NH4+ + OH-
What is happening here?
Base (accepts proton)
Acid (donates proton)
Which is the acid? base?