QQuestionChemistry
QuestionChemistry
The electron domain and molecular geometry of BrO^2 - is _________. A) trigonal planar, trigonal planar B) tetrahedral, trigonal planar C) trigonal pyramidal, linear D) tetrahedral, bent E) trigonal pyramidal
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Answer
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Step 1: Determine the electron geometry using the number of electron groups around the central atom.
The central atom in BrO$_2^-$ is Bromine (Br).
There are 6 valence electrons from Bromine, 2 from each Oxygen atom, and 1 extra electron from the negative charge, making a total of 9 electron groups. The electron geometry for 9 electron groups is octahedral.
Step 2: Analyze the molecular geometry based on the electron geometry and the presence of lone pairs.
Since there are only 2 atoms bonded to the central Bromine atom, the molecular geometry is determined by the arrangement of these two atoms and the lone pairs. In an octahedral electron geometry, if there are only two electron groups, they will be arranged in a linear fashion.
Final Answer
The electron domain and molecular geometry of BrO$_2^-$ is best described as tetrahedral, bent (option D).
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