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### half-life for second order

Posted: **Mon Mar 11, 2019 10:11 pm**

by **Hanniel U 2B**

In the 7th edition textbook, it states "not used" for the equation of half-life of the second order reaction But there are problems, for example, 7b.13 that ask us to calculate the half-life of a second order reaction. I am confused, can someone please clarify this?

### Re: half-life for second order

Posted: **Mon Mar 11, 2019 10:35 pm**

by **Nicole Elhosni 2I**

In class we discussed the half life of second order equations, so we do need to know it. The equation is tâ/â= 1/k[A]â

### Re: half-life for second order

Posted: **Mon Mar 11, 2019 10:51 pm**

by **Nicole Lee 4E**

The half life equations are all on the equation sheet.

### Re: half-life for second order

Posted: **Mon Mar 11, 2019 10:51 pm**

by **Adam Vuilleumier 2K**

You can derive the half life equation for a second order rate law equation by saying that 1/[0.5A]initial = -kt + [A]initial