Concept explainers
(a)
Interpretation:
The time required to decrease the activity 30 % of its original value needs to be determined.
Concept introduction:
All the radioactive reactions are first order reactions. For first order reaction, the relation between rate constant, k and half-life time is as follows:
Also, the integrated rate expression can be written as follows:
Here, t is time required to decrease the amount of substance from
(b)
Interpretation:
The percent of original activity remaining after 10 years needs to be determined.
Concept introduction:
All the radioactive reactions are first order reactions. For first order reaction, the relation between rate constant, k and half-life time is as follows:
Also, the integrated rate expression can be written as follows:
Here, t is time required to decrease the amount of substance from
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Chapter 18 Solutions
Chemistry: Principles and Reactions
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