## Homework 7A.17

$aR \to bP, Rate = -\frac{1}{a} \frac{d[R]}{dt} = \frac{1}{b}\frac{d[P]}{dt}$

Eileen Si 1G
Posts: 120
Joined: Fri Aug 30, 2019 12:17 am

### Homework 7A.17

How do you find the order of the reactant B, when given that its concentration is 1.25 mmol.L-1 and its initial rate is 17.4 mmol.L-1.s-1 in Experiment 2,
and its concentration is 3.02 mmol.L-1 and its initial rate is 50.8 mmol.L-1.s-1 in Experiment 3.
I understand how to find the order for reactant A and C, but I'm having difficulty with reactant B.

Joseph Saba
Posts: 154
Joined: Thu Jul 11, 2019 12:16 am

### Re: Homework 7A.17

Reactant B is second order. Since you know reactant C is zero order, you can focus on two reactions where reactant A is constant and reactant B is doubling and look at what it does to the rate constant. Hope this helps

Joowon Seo 3A
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am
Been upvoted: 1 time

### Re: Homework 7A.17

you can look at the the factor of how much the rate and the reactant are changing then deduce which order the reactant is.