Calculate the solubility of PbSO4 whose Ksp = 2.0 x 10-14:

1
Calculate the solubility of PbSO4 whoseKsp 2.0
x 10-14
2
Oxidation Reduction Reactions(REDOX)
3
REDOX Reactions

• Chemical reactions in which electrons are
  transferred

4
Oxidation

• The act of losing electrons
• Oxidation number increases

5
Reduction

• The act of gaining electrons
• Oxidation number decreases

6
REDOX Fact

• You cannot have oxidation without reduction or
  reduction without oxidation

7
Oxidizing Agent

• A substance that oxidizes another
• The oxidizing agent will be reduced

8
Reducing Agent

• A substance that reduces another
• The reducing agent will be oxidized

9
Balancing REDOX Reactions
10
Balancing Redox Rxns

1. Determine all ox
2. Determine elements being oxidized reduced
3. Divide rxn into half-rxns
4. Balance half-rxns

11
Balancing Half-Rxns

• Balance redox elements
• Balance ox with e-
• Balance e- between the two half-rxns

12
Balancing Half-Rxns

1. Balance total charge with H or OH-
2. Balance Hs with water
3. Check balance with oxygen

13
Balancing Redox Rxns

• 5) Add the two half-reactions
• Cancel like substances from each side of the full
  reaction
• Check work

14
Balance Redox Rxns

• MnO2 Cl-1
• Mn2 Cl2
• in acid

15
Balance Redox Rxns

• Cr2O7-2 NH3
• Cr3 NO3-1
• in base

16
Balance Redox Rxns

• MnO4-1 N2O3
• Mn3 N2O5
• in base

17
Balance Redox Rxns

• HNO3 Cu
• N2O Cu2
• in acid

18
Balance Redox Rxns

• SO2 Pb(OH)2
• SO3 Pb
• in base

19
Balance Redox Rxns

• MnO2 P4
• Mn2O7 PH3
• in acid

20
Balance Redox Rxns

• FeCl2 KNO3
• FeCl3 KNO
• in base

21
Balance Redox Rxns

• SnF2 KIO4
• KI SnF4
• in acid

22
Balance Redox Rxns

• IO3-1 I-1
• I3-1
• in acid

23
Balance Redox Rxns

• PbBr4 K2O
• PbBr2 O2
• in acid

24
Balance Redox Rxns

• Ca VO4-3
• CaO V2
• in acid

25
Balance Redox Rxns

• Fe(OH)3 Cr(OH)4-1
• Fe(OH)2 CrO4-2
• in base

26
Balance Redox Rxns

• Ni(OH)2 N2H4
• Ni N2
• in base

27
Balance Redox Rxns

• K3PO4 Cr2
• P2O3 K2CrO3
• in acid

28
Balance Redox Rxns

• H2SO4 Cr2
• SO H2Cr2O7
• in acid

29
Balance Redox Rxns

• PH3 KMnO4
• P2O5 Mn2O3
• in KOH