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Determine the molecular geometry of each molecule.(a) SiO2(b) BF3(c) CFCl3 (carbon is
Chapter 10, Problem 66P(choose chapter or problem)
Determine the molecular geometry of each molecule.
(a) \(\mathrm{SiO}_{2}\)
(b) \(B F_{3}\)
(c) \(\mathrm{CFCl}_{3}\) (carbon is central)
(d) \(\mathrm{H}_{2} \mathrm{CS}\) (carbon is central)
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QUESTION:
Determine the molecular geometry of each molecule.
(a) \(\mathrm{SiO}_{2}\)
(b) \(B F_{3}\)
(c) \(\mathrm{CFCl}_{3}\) (carbon is central)
(d) \(\mathrm{H}_{2} \mathrm{CS}\) (carbon is central)
ANSWER:Step 1 of 4
(a) \(\mathrm{SiO}_{2}\)
In \(\mathrm{SiO}_{2}\) the central atom is \(Si\), surrounded by two \(O\) atoms.
\(_{14}\mathrm{Si}\mathrm{\ Ne}\ 3\mathrm{s}^2\ 3\mathrm{p}^2\) \(_8\mathrm{O}\ 1\mathrm{s}^2\ 2\mathrm{s}^2\ 2\mathrm{p}^4\)
Total number of valence electrons = 4 + 6(2) = 16
Lewis structure of \(\mathrm{SiO}_{2}\) =
Steric number (SN) = (number of atoms bonded to central atom) +(number of lone pair on central atom)
SN = 2 + 0 = 2
SN is 2 i.e linear structure with bond angle \(180^{\circ}\).
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