The formula of nickel oxide is Ni_{0.98}O_{1. | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(C) Let there be $100$ formula units of $Ni_{0.98}O_{1.00}$. Thus,for $100$ $O^{2-}$ ions,there are $98$ nickel ions ($Ni^{2+}$ or $Ni^{3+}$). Let $x$

Vedclass · Accepted Answer

$96$

Vedclass · Answer

(C) Let there be $100$ formula units of $Ni_{0.98}O_{1.00}$. Thus,for $100$ $O^{2-}$ ions,there are $98$ nickel ions ($Ni^{2+}$ or $Ni^{3+}$). Let $x$ be the number of $Ni^{2+}$ ions. Then,the number of $Ni^{3+}$ ions is $(98 - x)$. For the compound to be electrically neutral,the total positive charge must equal the total negative charge: $2x + 3(98 - x) + 100(-2) = 0$ $2x + 294 - 3x - 200 = 0$ $-x + 94 = 0$ $x = 94$ So,the number of $Ni^{2+}$ ions is $94$. The percentage of $Ni^{2+}$ ions is $\frac{94}{98} 	imes 100 \approx 95.92\%$,which is approximately $96\%$.

The formula of nickel oxide is $Ni_{0.98}O_{1.00}$. What is the approximate percentage of $Ni^{2+}$ in it?

Similar Questions

How does the density of a crystal change in Schottky defect and Frenkel defect?

What kind of defects do most ionic crystals possess?

In an ionic solid,equal number of cations and anions are missing from their regular positions in the crystal lattice,creating vacancies. This is called-

Schottky defect and Frenkel defect are ....... .

What type of stoichiometric defect is shown by:
$(i)$ $ZnS$
$(ii)$ $AgBr$

Vedclass Test Series

Exam Paper Generator

Online Exam Module