# Question #a6130

May 30, 2015

The half life is 6.86s.

For a 2nd order reaction the half life depends on the initial concentration:

${t}_{\frac{1}{2}} = \frac{1}{k \left[{A}_{0}\right]}$

So:

${t}_{\frac{1}{2}} = \frac{1}{\left(0.54 \times 0.27\right)}$

${t}_{\frac{1}{2}} = 6.86 \text{s}$