The first-order reaction A → B, ℎas k= 1/8.00. if [A]0 = 0.500M, how long will it take [A] = 0.200M?
回答 (1)
2020-05-27 6:26 pm
The integrated rate law for the first order reaction:
ln([A]/[A]ₒ) = -kt
ln(0.200/0.500) = -(1/8.00)t
-(1/8.00)t = ln(0.4)
t = -8.00 ln(0.4)
Time taken = 7.33 units
If the unit of k is /s, time taken = 7.33 s
If the unit of k is /min, time taken = 7.33 min
etc.
ln([A]/[A]ₒ) = -kt
ln(0.200/0.500) = -(1/8.00)t
-(1/8.00)t = ln(0.4)
t = -8.00 ln(0.4)
Time taken = 7.33 units
If the unit of k is /s, time taken = 7.33 s
If the unit of k is /min, time taken = 7.33 min
etc.
收錄日期: 2021-04-18 18:35:36
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