In the reaction ${\text{BrO}}_{\text{3}}^{-}\left(\text{aq}\right){\text{\hspace{0.17em}+\hspace{0.17em}5Br}}^{-}\left(\text{aq}\right){\text{\hspace{0.17em}+\hspace{0.17em}6H}}^{\text{+}}\left(\text{aq}\right)\to {\text{\hspace{0.17em}3Br}}_{\text{2}}\left(\text{l}\right){\text{\hspace{0.17em}+\hspace{0.17em}3H}}_{\text{2}}\text{O}\left(\text{l}\right)$ The rate of appearance of bromine $\left({\text{Br}}_{\text{2}}\right)$is related to rate of disappearance of bromide ions as following :