## 15.23 c) Determining rate constant

$\frac{d[R]}{dt}=-k[R]; \ln [R]=-kt + \ln [R]_{0}; t_{\frac{1}{2}}=\frac{0.693}{k}$

Sarah Bui 2L
Posts: 61
Joined: Fri Sep 28, 2018 12:29 am

### 15.23 c) Determining rate constant

2 A-->B + C, given that [A]0 = 0.153 M and that after 115 s the concentration of B rises to 0.034M.

I am confused on how the solution manual explains how to find the rate constant in this question!

Samantha Man 1L
Posts: 63
Joined: Fri Sep 28, 2018 12:22 am

### Re: 15.23 c) Determining rate constant

You have to set up an ICE box to find your final value of [A] based on the change of [B] given. Then you plug it into the first order integrated rate law to find your rate constant.

Jaira_Murphy_2D
Posts: 31
Joined: Fri Apr 06, 2018 3:00 am

### Re: 15.23 A) Determining rate constant

Determine the rate constant for each of the following first-order reactions, in each case expressed for the rate of loss of A: (a) A --->B, given that the concentration of A decreases to one-half its initial value in 1000. s

How do you solve part a) for this question?