## Question 13 6th Edition

$\frac{d[R]}{dt}=-k[R]^{2}; \frac{1}{[R]}=kt + \frac{1}{[R]_{0}}; t_{\frac{1}{2}}=\frac{1}{k[R]_{0}}$

VivianaHF2L
Posts: 29
Joined: Fri Sep 28, 2018 12:20 am

### Question 13 6th Edition

When finding initial order for a second order equation which [A] do we use if the gave us H2 and I2?

MackenziePerillo-1L
Posts: 31
Joined: Fri Sep 28, 2018 12:19 am

### Re: Question 13 6th Edition

Do you mean when finding the initial reaction rate instead of the initial order?
If this is the case, the initial rate would be the constant, k * concentration of H2 *concentration of I2, being as it is a second order process for the reaction, with first order in respect to both reactants.

Samantha Jimenez 4k
Posts: 29
Joined: Fri Sep 28, 2018 12:21 am

### Re: Question 13 6th Edition

to find the initial reaction rate, you would just multiply the molarity of all the reactants times the k that they provided.