how-do-oxidation-numbers-of-each-element-of-the-following-reactions-change-1-ag-

Question

How do oxidation numbers of each element of the following reactions change?

1. Ag(s) + CN^-(aq) + O₂(g) → Ag(CN)₂^-(aq) + H₂O(l)

2. NaI(aq) + 3HOCl(aq) → NaIO₃(aq) + 3HCl(aq).

Accepted Answer

1.

Ag: 0 → –1

O: 0 → –2

C and N: no change

2.

I: +1 → +5

Cl: +1 → –1

Na, H, and O: no change

Answer

1.

Ag: 0 → –1

O: +1 → –2

C: +4 → –1

N: no change

2.

I: +1 → +5

O: +2 → –2

Cl: +1 → –1

Na and H: no change

Answer

1.

Ag: 0 → –1

O: 0 → –2

C and N: no change

2.

Na: 0 → +1

I: +1 → +5

Cl: +1 → –1

H and O: no change

Answer

1.

Ag: 0 → –1

O: +1 → –2

C: +4 → –1

N: no change

2.

I: +1 → +5

Cl: +1 → –1

Na, H, and O: no change

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