1. Oxidation-Reduction Reactions In each of the first 4 question slides, you must identify the element that is being oxidized and the element that is being reduced.

2. Al + OH -  AlO 2 - + H 2 O + H 2 The first element listed in each choice is being oxidized, the second is the one being reduced. 1.Al, O 2.Al, H 3.H, H 4.H, Al 5.H, O

3. CO + Fe 2 O 3  Fe + CO 2 The first element listed in each choice is being oxidized, the second is the one being reduced. 1.C, O 2.C, Fe 3.O, O 4.Fe, O 5.Fe, C

4. Cl 2 + OH -  ClO - + Cl - + H 2 O The first element listed in each choice is being oxidized, the second is the one being reduced 1.Cl, O 2.Cl, H 3.Cl, Cl 4.O, Cl 5.H, Cl

5. Cu + H + + NO 3 -  Cu 2+ + H 2 O + NO The first element listed in each choice is being oxidized, the second is the one being reduced 1.Cu, H 2.H, N 3.N, O 4.N, H 5.Cu, N

6. What is the oxidation state of carbon in the compound H 2 C 2 O 4 ? 1.0 2.1+ 3.2+ 4.3+ 5.4+

7. The half-life of Sr-90 is 28 years. How long will it take for a given sample of Sr-90 to be 87.5% decomposed? 1.8.75 half-lives 2.3.5 years 3.84 years 4.24.5 years 5.2.2 x 10 4 years

8. In the molecule SF 6, what is the hybridization of S? 1.sp 2.sp 2 3.sp 3 4.sp 3 d 5.sp 3 d 2

9. Participant Scores 23Logan Raschke 14Erica Narveson