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Consider a certain reaction Ararr produc...

Consider a certain reaction `Ararr` products with `k=2.0xx10^(-2)s^(-1)` .Calculate the concentration of a A remaining after 100s if the initial concentration of A is `1.0"mol .L"^(-1)`.

Text Solution

Verified by Experts

The unit of k show that given reaction is of first order.
Hence , `k=(2.303)/(t)log.([A]_(0))/([A])`
Given `k=2.0xx10^(-2)s^(-1),t=100s,[A]_(0)=1.0"mol.L"^(-1)`
`therefore2.0xx10^(-2)=(2.303)/(100)log.(1.0)/([A])" or, "log[A]=-0.8684`
`therefore[A]=0.1354"mol.L"^(-1)`
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