Which of the following statements is true?Select answer from the options belowThe rates of SN1 and SN2 reactions are not dependent on the concentration of the nucleophile.Only the rate of an SN1 reaction (not the rate of SN2 reaction) is dependent on the concentration of the nucleophile.Only the rate of an SN2 reaction (not the rate of SN1 reaction) is dependent on the concentration of the nucleophile.The rates of SN1 and SN2 reactions are highly dependent on the concentration of the nucleophile.
Question
Which of the following statements is true?Select answer from the options belowThe rates of SN1 and SN2 reactions are not dependent on the concentration of the nucleophile.Only the rate of an SN1 reaction (not the rate of SN2 reaction) is dependent on the concentration of the nucleophile.Only the rate of an SN2 reaction (not the rate of SN1 reaction) is dependent on the concentration of the nucleophile.The rates of SN1 and SN2 reactions are highly dependent on the concentration of the nucleophile.
Solution
The correct statement is: "Only the rate of an SN2 reaction (not the rate of SN1 reaction) is dependent on the concentration of the nucleophile."
Here's why:
SN1 and SN2 are two different types of nucleophilic substitution reactions in organic chemistry.
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SN1 reactions are unimolecular in rate of reaction and depend only on the concentration of the substrate. The rate of reaction for SN1 can be expressed as Rate = k[R-L], where R-L is the substrate and k is the rate constant. The nucleophile in this case does not affect the rate of the reaction.
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SN2 reactions, on the other hand, are bimolecular in rate of reaction and depend on the concentration of both the substrate and the nucleophile. The rate of reaction for SN2 can be expressed as Rate = k[R-L][Nu-], where R-L is the substrate, Nu- is the nucleophile, and k is the rate constant.
Therefore, only the rate of an SN2 reaction is dependent on the concentration of the nucleophile.
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