What is the average oxidation state of Cu in HgCa₂Ba₂Cu₃O_8-x if Hg is in the +2 oxidation state? A)+1 B)+2 C)+2 - 2x/3 D)+2 + 2x/3

Question

Quizplus · Accepted Answer

Since Hg is in the +2 oxidation state, the sum of the oxidation states of all the elements in the compound should equal +2. We know the oxidation state of all the elements except for Cu. 
Sum of oxidation states = (+2) + (1) + (1) + (12) + (1) + (0) + (0) + (12) + (1) + (0) + (Cu) + (13) + (0) + (-18+x) + (0)
Simplifying, 
Sum of oxidation states = 22 + Cu -18 + x
Setting this equal to +2, 
22 + Cu - 18 + x = +2
Cu + x/3 = -2
Cu = -2 + (-x/3)
Therefore, the average oxidation state of Cu in the compound is +2 - 2x/3.

What Is the Average Oxidation State of Cu in HgCa2Ba2Cu3O8-X

What Is the Average Oxidation State of Cu in HgCa₂Ba₂Cu₃O_8-X