Question

The units of the rate constant of a second order reaction are

• A. $mo{l}^{-1}{L}^{-1}{s}^{-1}$
• B. $mo{l}^{-1}{L}^{-1}{s}^{-1}$
• C. $mo{l}^{-1}Ls$
• D. $mol{L}^{-1}{s}^{-1}$

Answer 1

Answer: (B)

$\frac{dx}{dt}=k[A{]}^2$
$k=\frac{dx}{dt[A{]}^2}$
$=\frac{mol(L{)}^2}{L\times s\times (mol{)}^2}$
$=mo{l}^{-1}L{s}^{-1}$