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What is the sum of the oxidation numbers of all the atoms in each of the...

What is the sum of the oxidation numbers of all the atoms in each of the following polyatoic ions?

A.) OH-

B.) NH4+

C.) SO42-

D.) PO43-

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Answer #1

A.) OH-

Oxidation number of O = -2

Oxidation number of H =+1

the sum of the oxidation numbers of all the atoms = -2+1=-1

B.) NH4+

Oxidation number of O = -2

Oxidation number of H =+1

Oxidation number of N =-3

the sum of the oxidation numbers of all the atoms = 4*+1+(-3) = +1

C.) SO42-

Oxidation number of O = -2

Oxidation number of S =+6

the sum of the oxidation numbers of all the atoms = 4(-2)+6 = -8+6=-2

D.) PO43-

Oxidation number of O = -2

Oxidation number of P =+5

the sum of the oxidation numbers of all the atoms = 4(-2)+5 = -8+5=-3

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