00:01
We have given here first order reaction for first order reaction.
00:25
So we have a formula that is k is equals to 2 .303 divided by t log a knot divided by a t.
00:56
So that is the a not is the initial concentration a to a t is the final concentration at a particular time t is the time taken okay and k is the rate constant so now putting the values k is 6 .7 multiplying 10 rift power minus 4 second inverse okay divided by we have 2 .303 and this is here time which is 8 .8 minute.
01:32
Now this is minute and the rate constant is in second inverse.
01:36
So for this reason we should convert it into seconds and one minute consists of 60 seconds.
01:42
We all know.
01:43
So that's why it will be multiplied by 60.
01:46
So now this will be the time will be in seconds.
01:51
Okay, multiplied by 60.
01:53
Log.
01:54
Now initial concentration we have given 0.
01:59
25 molar divided by final concentration.
02:05
So this is what we have to find out at this particular time...