For the reaction, 3 I + \(\mathrm{S}_2 \mathrm{O}_8^{2-} \rightarrow \mathrm{I}_3^{-}+2 \mathrm{SO}_4^{2-}\) at a particular time t, \(\frac{\mathrm{d}\left[\mathrm{SO}_4^{2-}\right]}{\mathrm{dt}}\) is 2.2 × 10-2 mol dm3 s-1. What is the value of \(-\frac{\mathrm{d}\left[\mathrm{I}^{-}\right]}{\mathrm{dt}}\)?
1
1.1 × 10-2 mol dm-3 s-1
2
3.3 × 10-2 mol dm-3 s-1
3
4.4 × 10-2 mol dm-3 s-1
4
6.6 × 10-2 mol dm-3 s-1