The decomposition of NH 3 on a platinum surface is zero order reaction. If rate constant (k) is 4\times 10^{-3}Ms^{-1}, how long will it take to reduce the initial concentration of NH 3 from 0.1 M to 0.064 M.

 

 

 

 
 
 
 
 

Answers (1)

For a zero-order reaction,

    k = \frac{A_o - A}{t}

\Rightarrow t = \frac{A_o - A}{k} = \frac{0.1- 0.064}{4\times 10^{-3}} = \frac{0.036}{4\times 10^{-3}} = 0.009\times 10^3 s = 9 \textup{ secs}

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