﻿ Analysis shows that nickel oxide has formula Ni 0.98 O1.00 What fractions of Nickel exist as Ni2+ and Ni3+ ions?  from Chemistry The Solid State Class 12 Nagaland Board

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Analysis shows that nickel oxide has formula Ni 0.98 O1.00 What fractions of Nickel exist as Ni2+ and Ni3+ ions?

Formula is Ni0.98O1.00
So the ration of Ni : O = 98:100
So if there are 100 atoms of oxygen then 98 atoms of Ni,

Let number of atoms of Ni+2 = x
Then number of atoms of Ni+3 = 98–x
Charge on Ni = charge on O
So that oxygen has charge –2
3(98–x) + 2x = 2 (100)
294 –3x +2x = 200
–x = – 94
x = 94

Percentage of Ni+2 = (atom of Ni+2/total number of atoms of Ni)100
=100(94/98)x100
= 96%

Percentage of Ni+3
=100 – Ni+2
=100 – 96
= 4 %

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