Chemistry - CHEMICAL BONDING Question with Solution | TestHub

To identify species with tetrahedral units, we analyze their structures:

N₂O₅(s): $[N{O}_2{]}^{+}[N{O}_3{]}^{-}$ (NO₂⁺ is linear, NO₃⁻ is trigonal planar)

PCl₅(s): $[PC{l}_4{]}^{+}[PC{l}_6{]}^{-}$ (PCl₄⁺ is tetrahedral)

PBr₅(s): $[PB{r}_4{]}^{+}B{r}^{-}$ (PBr₄⁺ is tetrahedral)

NH₄Cl(s): $[N{H}_4{]}^{+}C{l}^{-}$ (NH₄⁺ is tetrahedral)

Na₂SO₄(s): $2N{a}^{+}[S{O}_4{]}^{2-}$ (SO₄²⁻ is tetrahedral)

XeF₆(s): $[Xe{F}_5{]}^{+}{F}^{-}$ (XeF₅⁺ is square pyramidal)

Al₂Cl₆: $A{l}_{2}C{l}_6$ (each Al is tetrahedral with 3 bridging and 1 terminal Cl)

Pyrosilicate: $[S{i}_2{O}_7{]}^{6-}$ (two SiO₄ tetrahedra sharing one oxygen)

Species with tetrahedral units: PCl₅(s), PBr₅(s), NH₄Cl(s), Na₂SO₄(s), Al₂Cl₆, Pyrosilicate.

Total: 6