In the following reaction, how is the rate of appearance of the underlined product related to the ra

Question

In the following reaction, how is the rate of appearance of the underlined product related to the rate of disappearance of the underlined reactant 
$ \underline{\mathrm{BrO}_3^{-}(a q)}+5 \mathrm{Br}^{-}(a q)+6 \mathrm{H}^{+}(a q) \longrightarrow 3 \mathrm{Br}_2(l)+3 \mathrm{H}_2 \mathrm{O}(a q) $

Professor PC Thomas Classes · Answer

(c) 
Rate of disappearance $=-\frac{d\left[\mathrm{BrO}_3^{-}\right]}{d t}$
Rate of appearance $=+\frac{d\left[\mathrm{Br}_2\right]}{d t}$
Rate of reaction $=-\frac{d\left[\mathrm{BrO}_3^{-}\right]}{d t}=\frac{1}{3} \frac{d\left[\mathrm{Br}_2\right]}{d t}$