# Give the oxidation numbers for the specified atoms in the following molecules and ions. (a) Mg3N2 N:   (b) CaC2 C:   (c) ZnO22− O:   (d) NaBH4 B:   (e) C2O42− C:   (f) WO42− W:

Question
Asked Sep 23, 2019

Give the oxidation numbers for the specified atoms in the following molecules and ions.

(a) Mg3N2

N:

(b) CaC2

C:

(c) ZnO22−

O:

(d) NaBH4

B:

(e) C2O42−

C:

(f) WO42−

W:

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Step 1
• Mg3N2

N: Assume that the oxidation state of N = x

Oxidation sate of Mg = 2

• The sum of oxidation numbers of all the elements in the given molecule is equal to zero.

3(2) + 2x= 0

2x = -6

x = -6/2 = -3

Step 2

(b) CaC2

C:    Assume that the oxidation state of C = x

Oxidation sate of Ca  = +2

• The sum of oxidation numbers of all the elements in the given molecule is equal to zero.

2 + 2 x = 0

2x = -2

x = -2/2 = -1

Step 3

(c) ZnO22−

O: Assume that the oxidation state of O

Oxidation sate of Zn = +2

The sum of oxidation numbers of all the elements in the given molecule is equal to zero. While in case of ion...

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