The hydrolysis of tert-butyl bromide in water follows the SN1 mechanism. Its rate law is

Arate $= k [(CH X_{3}) X_{3} CBr]$
Brate $= k [(CH X_{3}) X_{3} CBr] [OH X^{-}]$
Crate $= k [(CH X_{3}) X_{3} CBr]^{2}$
Drate $= k [OH X^{-}]$

Answer: A

In SN1 the slow step is the ionisation of the C-Br bond to form the tertiary carbocation. The nucleophile enters after the slow step, so the rate depends only on the concentration of the halide: first order.

Practice Haloalkanes and Haloarenes More on Reactions of alkyl halides with nucleophiles

Previous questionNext question

The hydrolysis of tert-butyl bromide in water follows the SN1 mechanism. Its rate law is

Answer: A

More questions on Reactions of alkyl halides with nucleophiles