Question

Write the formula of following-

(a) Sodium nitrite

(b) Cuprous oxide

(c) Aluminium phosphate

(d) Plumbic chloride

(e) Calcium sulphate

Answer 1

(a) Sodium nitrite - ${\mathrm{NaNO}}_2$ , Cation is ${\mathrm{Na}}^{+}$ and Anion is ${{\mathrm{NO}}_2}^{-}$

(b) Cuprous oxide - ${\mathrm{Cu}}_2\mathrm{O}$, Cation is ${\mathrm{Cu}}^{+}$and Anion is ${\mathrm{O}}^{-2}$

(c) Aluminium phosphate - ${\mathrm{AlPO}}_4$, Cation is ${\mathrm{Al}}^{+3}$ and Anion is ${{\mathrm{PO}}_4}^{-}$

(d) Plumbic chloride - ${\mathrm{PbCl}}_4$, Cation is ${\mathrm{Pb}}^{+4}$ and Anion is ${\mathrm{Cl}}^{-}$

(e) Calcium sulphate - ${\mathrm{CaSO}}_4$ , Cation is ${\mathrm{Ca}}^{+2}$ and Anion is ${\mathrm{SO}}_4^{-2}$