QQuestionChemistry
QuestionChemistry
"The electron geometry and molecular geometry of a water (H^2O) molecule are, respectively:
Select one:
tetrahedral, tetrahedral
trigonal planar, trigonal planar
tetrahedral, bent
trigonal planar, bent"
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Answer
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Step 1: Determine the electron geometry of a water molecule.
The water molecule has 2 hydrogen atoms and 1 oxygen atom, which gives it a total of 2 + 2 = 4 electron groups around the central oxygen atom (2 from bonding electrons and 2 from lone pairs). The electron geometry for 4 electron groups is tetrahedral.
Step 2: Determine the molecular geometry of a water molecule.
The water molecule has 2 bonding electron groups (to the hydrogen atoms) and 2 lone pairs of electrons. The molecular geometry for 2 bonding electron groups and 2 lone pairs is bent or V-shaped.
Final Answer
Therefore, the correct answer is option (c): tetrahedral, bent.
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