The options under the drop down menu: Divided by 4 Halved No effect Increased 2x

Question

The options under the drop down menu: Divided by 4 Halved No effect Increased 2x Increased 3x Increased 6x Increased 9x What change would you expect on the rate of the Sx2 reaction of 1 iodo 2-meth concentration is unchanged? ylbutane with cyanide ion if the nucleophile concentration is halved and the alkyl halide no effect What change weuld is doubled ? you expect on the rate of the reaction of ethanol with 2-iodo 2 methylbutane if the nucleophile concentration is unchanged and the alkyl halide concentration Be as precise as possible in selecting your answer Submit Answer Try Another Version 1 item attempt remaining

Explanation / Answer

Rate of SN2 raection = K [Substrate] [Nucleophile]

We see that the rate of a SN2 raection is directly proportional to the concentration of Nucleophile

=> If the nucleophile concentration is halved and the alkyl halide concentration is unchanged the rate of the reaction is also Halved

The reaction of ethanol with 2-iodo-2-methylbutane follow SN1 mechanism.

For SN1 reaction,

Rate = K [Substrate]

=> Rate of the reaction is directly proportional to the concentration of alkyl halide.

=> Rate of the reaction is increased 2X

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