A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is ________ min. (Round off to the nearest integer).
[Use In 2 = 0.69; In 10 = 2.3]
A reaction has a half life of 1 min. The time required for 99.9% completion of the reaction is ________ min. (Round off to the nearest integer).
[Use In 2 = 0.69; In 10 = 2.3]
Asked by Shiksha User
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1 Answer
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Half life, t? /? = 1min
Let, time of 99.9% completion of reaction be 't' min
Let the reaction is of first order
K = (2.303/t) log? ( [R]? / [R])
[R] = 0.001 [R]?
t = (2.303 × 3 min) / 0.693
t = 9.99 min
the nearest integer is 10.
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