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Rate of Reaction

In the follow...

Question

In the following reaction $2 H_{2} O_{2} (a q) \to 2 H_{2} O (l) + O_{2} (g)$ rate of formation of $O_{2}$ is $36 g . m i n^{- 1}$ ,
(a) What is rate of formation of $H_{2} O$ ?
(b) What is rate of disappearance of $H_{2} O_{2}$ ?

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Solution

$2 H_{2} O_{2} (a . q) \to 2 H_{2} O (l) + O_{2} (g)$

$- \frac{1}{2} \frac{d [H_{2} O_{2}]}{d t} = + \frac{1}{2} \frac{d [H_{2} O]}{d t} = \frac{d [O_{2}]}{d t}$

Given $\frac{d [O_{2}]}{d t} = 36 g m i n^{- 1}$

$\frac{d [O_{2}]}{d t} = \frac{36}{32} m o l m i n^{- 1}$

$\frac{d [H_{2} O]}{d t} = 2 \frac{d [O_{2}]}{d t} = 2 \times \frac{36}{32} \times 18 g m i n^{- 1}$

$\frac{d [H_{2} O_{2}]}{d t} = - 2 \frac{d [O_{2}]}{d t} = - 2 \times \frac{36}{32} \times 34 g m i n^{- 1}$

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