QQuestionChemistry
QuestionChemistry
"Predict the molecular geometry for C^2H^4.
A. Linear
B. Bent
C. Tetrahedral
D. Trigonal Planar
"
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Answer
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Step 1:: Determine the electron geometry of the molecule
The electron geometry for C^2H^4 (ethylene) can be determined by counting the total number of electron groups around the central atom. In this case, the central atom is carbon, and it is bonded to two hydrogen atoms and another carbon atom. Therefore, there are a total of 4 electron groups (2 bonds + 2 lone pairs) around the central carbon atom.
Step 2:: Determine the hybridization of the central atom
The hybridization of the central atom can be determined by comparing the number of electron groups and the observed molecular geometry. For 4 electron groups, the hybridization is sp^2. This means that the central carbon atom undergoes sp^2 hybridization.
Step 3:: Determine the molecular geometry
Since the central carbon atom is sp^2 hybridized, the molecular geometry is trigonal planar. This is because sp^2 hybridization results in a flat, planar geometry with 120 -degree angles between the electron groups.
Step 4:: Compare the predicted geometry to the given answer choices
The predicted molecular geometry for C^2H^4 is trigonal planar, which corresponds to option D.
Final Answer
Trigonal Planar.
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