For a first order reaction, the ratio of the time for 75% completion of a reaction to the time for 50% completion is ____________. (Integer answer)
Answer (integer)
2
Solution
$k = {{2.303} \over t}\log {a \over {a - x}}$<br><br>$${{2.303} \over {{t_{50\% }}}}\log {{100} \over {100 - 50}} = {{2.303} \over {{t_{75\% }}}}\log {{100} \over {100 - 75}}$$<br><br>$\Rightarrow$ ${t_{75\% }} = 2{t_{50\% }}$
About this question
Subject: Chemistry · Chapter: Chemical Kinetics · Topic: Rate of Reaction
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