Question

A first order reaction is 75% completed in 100 minutes. How long will it take for its 93.75% completion ?​

Answer 1

Answer:

   k=2.303tlog(a/a−x);

k=2.30330log(100/100−75)                          

      k=2.303tlog(100/100−93.75)

 Put the value of K from above equation we get the value of t

therefore  ∴   t=60min.

here a  whole by a-x