Answer:
Formula of nickel oxide : or Ni98 O100
Let no. of Ni2+ ions = x
no. of Ni3+ ions = 98 - x
Total - ve charge on 100, O-? ion = 200
Total + ve charge x, Ni2+ ions = 2x
Total + ve charge on (98 - x), Ni3+ ions = 3 (98 - x)
Total + vc charge on Ni ions = 2x + 3(98 - x)
For the substance to be electrically neutral
Total +ve charge = Total ?ve charge
2x + 3(98 - x) = 200
2x - 3x = 200 ? 294
x = 94
Percentage of Ni2+ ions
Percentage of ions = 100?96 = 4%
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