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Multiple Choice
Which of the following statements correctly describes the Lewis dot structure of the neutral compound C2HCl3 (1,1,2-trichloroethene)?
A
Each carbon atom forms a double bond with each other, and all hydrogen and chlorine atoms are attached to the carbons with double bonds.
B
Each carbon atom forms a triple bond with each other, and all hydrogen and chlorine atoms are attached to the carbons with single bonds.
C
Each carbon atom forms a single bond with each other, and all hydrogen and chlorine atoms are attached to the carbons with double bonds.
D
Each carbon atom forms a double bond with each other, and all hydrogen and chlorine atoms are attached to the carbons with single bonds.
Verified step by step guidance
1
Identify the molecular formula and structure: C2HCl3 corresponds to 1,1,2-trichloroethene, which is an alkene with two carbon atoms and a double bond between them.
Recall that in alkenes, the carbon atoms are connected by a double bond, which consists of one sigma bond and one pi bond, allowing for the correct bonding framework.
Determine the bonding of substituents: hydrogen and chlorine atoms are attached to the carbon atoms via single bonds, as halogens and hydrogen typically form single covalent bonds.
Construct the Lewis structure by placing the double bond between the two carbon atoms, then attach the hydrogen and chlorine atoms with single bonds to the appropriate carbons, ensuring each atom satisfies the octet rule.
Verify that the total number of valence electrons used in the structure matches the sum of valence electrons from all atoms (carbon, hydrogen, and chlorine) and that the molecule is neutral.