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Factors Affecting the Rate of a Chemical Reaction

In case of un...

Question

In case of unimolecular reaction, the time required for 99.9% of the reaction to take place is x times that required for half of the reaction. The value of x is_________.

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Solution

As we know,
for first order reaction
$t = (2.303 / k) l o g (a / a - x)$
$t_{1} = (2.303 / k) l o g (a / a - a / 2)$
$t_{2} = (2.303 / k) l o g (1 / 1 - 0.1)$
$t_{2} = 10 t_{1}$

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