1. What is a redox reaction? Warm-up 3/7/11 Assign ox #’s CrO 4 –2 SbCl 5 Write half-reactions? Fe 2 O 3(s) + CO (g)  Fe (s) + CO 2(g)

2. Daily EQ:What is a redox reaction? Warm-up 3/7/11 Balance the following using half reaction method Bi 2 S 3(s) + HNO 3 (aq)  Bi(NO 3 ) 3(aq) + NO (g) + S (s) + H 2 O (g)

3. Homework Due Wednesday 3/9/11 Due Wednesday 3/9/11 p641 9,10 p641 9,10 643 11,12,15,16 643 11,12,15,16 p657 35,36,40 p657 35,36,40

4. Daily EQ:? 3/1/11 Write two half reactions Balance everything other than H and O 1 st Add H 2 0 to side that needs more Oxygen Add H + to opposite side Balance charges by adding electrons Add 2 half reactions back together

5. Daily EQ:What is a real world application of redox reactions? 2/24/11 Balance the following redox reaction Cr 2 O 7 2- + C 2 H 5 OH  Cr 3+ + CH 3 COOH ElementsLHSRHS C-20 H+1+1 O-2-2 Cr+6+3

6. Daily EQ:What is a redox reaction? 2/24/11 Balance the following redox reaction Cr 2 O 7 2- + CH 3 CH 2 OH  Cr 3+ + CH 3 COOH Cr 2 O 7 2-  2Cr 3+  CH 3 CH 2 OH + H2O  CH 3 CO 2 H + 4 e - + 4 H +  C 2 H 5 OH  CH 3 COOH Reduction Half reaction Oxidation half reaction