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Redox Practice Quiz

Redox Practice Quiz. What is the oxidation number of the underlined element in each compound below? H N O 3 C O 2 K Mn O 4 S 2 O 3 2-. +5… +1+N+3(-2)=0. +4… C+2(-2)=0. +7… +1+Mn+4(-2)=0. +2… 2S+3(-2)=-2. Question #1. What is being oxidized and what reduced in the equation below?

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Redox Practice Quiz

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  1. RedoxPracticeQuiz

  2. What is the oxidation number of the underlined element in each compound below? • HNO3 • CO2 • KMnO4 • S2O32- +5… +1+N+3(-2)=0 +4… C+2(-2)=0 +7… +1+Mn+4(-2)=0 +2… 2S+3(-2)=-2 Question #1

  3. What is being oxidized and what reduced in the equation below? Fe + K2SO4 K + FeSO4 Fe=ox (0+2); K=red (+10) Question #2

  4. What is being oxidized and what is being reduced in the equation below? 2KClO3 3O2 + 2KCl O=ox (-20); Cl=red (+5-1) Question #3

  5. Is each of the equations below oxidation, reduction, neither, or both? • Au + O2 AuO2 • F2 + 2e- 2F- • 2NaOH + CaCl2  Ca(OH)2 + 2NaCl • C2H6 + O2  CO2 + H2O • Fe  Fe2+ + 2e- Both… Au=ox O=red Red… gains electrons Neither… no ox #s change Both… C=ox O=red Ox… loses electrons Question #4

  6. Write half equations for the oxidation and reduction parts of the reaction below: 4Fe + 3O2 2Fe2O3 Oxidation: Reduction: 4Fe  4Fe3+ + 12e- 3O2+ 12e-  6O2- Question #5

  7. Write half equations for the oxidation and reduction parts of the reaction below: 2Al + 3CuCl2 2AlCl3 + 3Cu Oxidation: Reduction: 2Al  2Al3+ + 6e- 3Cu2+ + 6e-  3Cu Question #6

  8. Notes • Your packet! • Half-equations Lab (green) What to study?

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