First slide

Zero order reactions

Question

Consider the zero order reaction, A $\to$ B. If the half life of the reaction is 50 minutes and the rate constant of the reaction is 0.05 M.min^-1 then the initial concentration of ‘A’ is

Moderate

A

10M
B

5M
C

2.5M
D

20M

Solution

$For a zero order reaction, t_{\frac{1}{2}} = \frac{a}{2 K}; 50 \min = \frac{a}{2 \times 0.05 M . \min^{- 1}}; a = 5 M;$

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