1) What is the oxidation state of copper before and after the reaction below? 2N

Question

1) What is the oxidation state of copper before and after the reaction below?

2NO3-(aq) + 8H+(aq) + 3Cu(s) 3Cu2+(aq) + 2NO(g) + 4H2O(l)

- Before the reaction?

- After the reaction?

2) What is the oxidation state of manganese (Mn) before and after the reaction below?

SO32-(aq) + MnO4-(aq) SO42-(aq) + Mn2+(aq)

- Before the reaction?

- After the reaction?

3) What is the oxidation state of sulfur before and after the reaction below?

SO32-(aq) + MnO4-(aq) SO42-(aq) + Mn2+(aq)

- Before the reaction?

- After the reaction?

4) Select all that appy for the Cl- anion in the reaction below.

ClO4-(aq) + Cl-(aq) ClO3-(aq) + Cl2(g)

- Oxidized

- Reduced

- Oxidizing Agent

- Reducing Agent

Explanation / Answer

1) before-0
     after-+2

2) before-+7
     after-+2

3) before- +4
      after-+6

4) change in oxidation state-> -1 -> 0
      reducing agent , oxidized

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