• # question_answer Analysis shows that nickel oxide has the formula $N{{i}_{0.98}}O$. What fraction of the nickel exists$N{{i}^{3+}}$ ions? A)  1%                              B)  2%             C)  4%                              D)  8%

Solution :

$\because$ $N{{i}_{98}}{{O}_{100}}$ means total charge due to oxygen atoms $=-2\times 100=-200$ $\therefore$ Total charge due to Ni ions must be +200. Let $N{{i}^{2+}}$ ions be $x$. $\therefore$    $N{{i}^{3+}}$ ions will be $(98-x)$ $\therefore$    $(+2)\,(x)+\,(+3)\,(98-x)=+200$ $\therefore$    $x=94$ $\therefore$ Fraction of Ni as $N{{i}^{2+}}=\frac{94}{98}\times 100=96%$ And fraction of Ni as $N{{i}^{3+}}=\frac{4}{98}\times 100=4%$

You need to login to perform this action.
You will be redirected in 3 sec