It is observed that Li_2O is soluble in NiO i | vedclass

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(C) When $Li^+$ ions replace $Ni^{2+}$ ions in the $NiO$ lattice,the electrical neutrality of the crystal must be maintained.Since $Li^+$ has a $+1$ c

Vedclass · Accepted Answer

$NiO$ contains an equal number of $Li^+$ and $Ni^{3+}$ ions.

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(C) When $Li^+$ ions replace $Ni^{2+}$ ions in the $NiO$ lattice,the electrical neutrality of the crystal must be maintained.Since $Li^+$ has a $+1$ charge and $Ni^{2+}$ has a $+2$ charge,replacing one $Ni^{2+}$ with one $Li^+$ creates a charge deficiency of $+1$.To compensate for this,an equivalent number of $Ni^{2+}$ ions must be oxidized to $Ni^{3+}$ ions.Therefore,for every $Li^+$ ion introduced,one $Ni^{2+}$ ion is converted to $Ni^{3+}$,resulting in an equal number of $Li^+$ and $Ni^{3+}$ ions in the crystal.

It is observed that $Li_2O$ is soluble in $NiO$ in small amounts,where $Li^+$ ions occupy some of the cation sites. Which of the following conclusions can be drawn?

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