First slide

First order reactions

Question

For the first order reaction, X $\to$ Y the time taken for 96.875% completion of the reaction is 1000 minutes. Time taken for 75% completion of the reaction will be ------ minutes

Moderate

A

400
B

200
C

600
D

800

Solution

$\frac{t_{96.875 %}}{t_{50 %}} = \frac{\frac{2.303}{K} \log \frac{100}{100 - 96.875}}{\frac{2.303}{K} \log \frac{100}{100 - 50}}; \frac{t_{96.875 %}}{t_{50 %}} = \frac{5 \log 2}{\log 2} t_{96.875 %} = 5 t_{50 %}; Conclusion : t_{99.9 %} = 10 t_{50 %}; t_{75 %} = 2 t_{50 %}; t_{87.5 %} = 3 t_{50 %}; t_{93.75 %} = 4 t_{50 %}; t_{96.875 %} = 5 t_{50 %};$

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App