1. ACIDS, BASES and SALTS Definitions Acid Base
Arrhenius
Dissociates in water to produce a hydrogen ion (H +)
HCl(aq) + H2O(l)  H+(aq) + Cl-(aq)
H3O+(aq) + Cl-(aq)
Dissociates in water to produce
a hydroxide ion (OH -)
NaOH(aq) + H2O(l)  Na+(aq) + OH-(aq)

2. Accepts pair of electrons Donates a pair of electrons
ACIDS, BASES and SALTS
Definitions
Acid
Base
Lewis
Accepts pair of electrons
Donates a pair of electrons

3. ACIDS, BASES and SALTS Hydrogen ion donor (H +) Proton donor
Definitions
Acid
Base
Bronsted-Lowry
Hydrogen ion donor (H +)
Proton donor
Hydrogen ion acceptor (H +)
Proton acceptor

4. ACIDS, BASES and SALTS Hydrogen ion donor (H +) Proton donor
Definitions
Acid
Base
Bronsted-Lowry
Hydrogen ion donor (H +)
Proton donor
Hydrogen ion acceptor (H +)
Proton acceptor
11H ● → 11H +
Hydrogen atom loses e- to become hydrogen ion

5. ACIDS, BASES and SALTS NH3 + H2O  NH4+ + OH- NH4+ + OH-  NH3 + H2O
Conjugate Acid – Base Pairs - (use Bronsted-Lowry definition)
  NH H2O  NH OH-
NH OH  NH H2O

6. Identify the conjugate acid base pairs.
CH3COO- + H2O ↔ CH3COOH + OH-   

7. Identify the conjugate acid base pairs.
HCN + H2O ↔ H3O CN-

8. Identify the conjugate acid base pairs.  
HNO3 + H2O ↔ NO H3O+
H2PO H2O ↔ H3O HPO42-
H3PO OH- ↔ H2PO H2O
HClO4 + CH3COOH ↔ CH3COOH ClO2-

9. For the following list which two substances act like acids and which act like bases.
H2CO H2O ↔ H3O HCO3-
HI H2O ↔ H3O I-

10. HSO HF ↔ H2SO F-
H2O H2O ↔ H3O OH-

11. Amphoteric (Amphiprotic) substances
ACIDS, BASES and SALTS
Amphoteric (Amphiprotic) substances
– can act as either an acid _________________
or as a base _________________________
proton (H+) donor
proton (H+) acceptor

12. ACIDS, BASES and SALTS
Identify the acid, base, conjugate acid and conjugate base. (see Table L - the stronger acid is the proton donor)
Remember Bronstead-Lowery Definitions:
An acid donates a proton (H+)
A base accepts a proton (H+)

13. ACIDS, BASES and SALTS H2O H2O + NH3 ↔ H2O + HCl ↔ NH3 NH3 + HCl ↔
 NH3 NH3 + HCl ↔
  NH3 + H- ↔   
HCO3- HCO3- + H2O ↔
  HCO3- + HSO4- ↔
 HSO4- HSO4- + H2O ↔
  HSO4- + HCl ↔
 H2PO4- H2PO4- + H2O ↔
  H2PO4- + HBr ↔