Posted by Nancy on Wednesday, August 6, 2014 at 3:27pm.
Still can't figure this one out sorry for reposting, this is the last post, if someone has time to review this question and see if they can figure out how the textbook got 1.0x10^7 seconds
Iodine combines to form I2 in liquid propane solvent with a constant of 1,5 x 10^10 L/mol. The rate is 2nd order. Since the reaction occurs quickly, a flash of light creates an I concentration of .0100M. How long will it take for 95% of the atoms to form I2?
This must use a second order rate equation, but I cannot get 1.0x10^7 s which is the answer.
I assume 1.0x10^7 s = seconds.

chemistry repost  DrBob222, Wednesday, August 6, 2014 at 4:34pm
A couple of points.
1. Did you mean "occurs quickly, a flash of light creates an I2 concn ......? so that the rate law is rate = k(I)^2 for 2I ==> I2
2. I have been unable to use this to obtain 1.0E6 but I have close to that.
3. I will look at it again if you will post what you've done. I can't get back for about 23 hours from now.
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