Multiple Choice
What is the molecular geometry of the bromate ion, BrO_3^-?
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12. Molecular Shapes & Valence Bond Theory
Molecular Geometry
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Which of the following best describes the molecular geometry of H2S?
A
Bent
B
Tetrahedral
C
Trigonal planar
D
Linear
Verified step by step guidance1
Identify the central atom in the molecule H\_2S, which is sulfur (S).
Determine the number of valence electrons around the central atom. Sulfur has 6 valence electrons, and each hydrogen contributes 1 electron, for a total of 8 electrons to consider.
Draw the Lewis structure of H\_2S, placing the two hydrogen atoms bonded to sulfur and accounting for lone pairs on sulfur. Sulfur will have two bonding pairs and two lone pairs of electrons.
Use the VSEPR (Valence Shell Electron Pair Repulsion) theory to predict the molecular geometry. The electron pairs (bonding and lone pairs) around sulfur will arrange themselves to minimize repulsion.
Since there are two bonding pairs and two lone pairs, the molecular geometry is 'bent' (similar to water), not tetrahedral, trigonal planar, or linear.
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