A first order reaction is 20% complete i...

A first order reaction is 20% complete in 10 minutes. What is the specific rate constant for the reaction?

0.0970 `"min"^(-1)`

0.009 `"min"^(-1)`

0.0223 `"min"^(-1)`

`2.223 "min"^(-1)`

Text Solution

Verified by Experts

The correct Answer is:

`a - x = (80)/(100) xx a 0.8a, t = 10` min
`k = (2.303)/(t) "log" (a)/(a - x) = (2.303)/(10) "log" (a)/(0.8a)`
`k = 0.2303 "log" (10)/(8) = 0.2303 (1-0.9030)`
`= 0.2303 xx 0.0970 0.2303 "min"^(-1)`

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