Question

50 % of first order reaction is completed in 231 minutes. Calculate the time required to complete 90 % of the reaction.

Answer 1

If the reaction 50% is completed In 231 minutes
Then 1% =?
So; 231/50=4.62 minutes
So further to find we have to multiply 90 with 4.62
4.62x90=415.8 minutes
Or 6.93 hours
Therefore the 90% reaction will complete in=415.8 minutes or 6.93 hours