Top Posters
Since Sunday
1
Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
New Topic  
asad345 asad345
wrote...
Go to Answer
Posts: 127
Rep: 0 0
3 years ago
The oxidation of Cr3+ to CrO42– can be accomplished using Ce4+ in a buffered solution. The following data were obtained:
 
Relative
Initial Rate
[Ce4+]0
[Ce3+]0
[Cr3+]0
 
1
2.0 × 10–3
1.0 × 10–2
3.0 × 10–2
 
2
4.0 × 10–3
2.0 × 10–2
3.0 × 10–2
 
4
4.0 × 10–3
1.0 × 10–2
3.0 × 10–2
 
16
8.0 × 10–3
2.0 × 10–2
6.0 × 10–2

​

Determine the order in the rate law of the species Cr3+.

 
Reference: Ref 12-7

​

​



▸ 1

▸ 2

▸ 3

▸ –1

▸ –2
Textbook 
Chemistry: An Atoms First Approach

Chemistry: An Atoms First Approach


Edition: 3rd
Authors:
Read 185 times
2 Replies
Replies
Answer verified by a subject expert
IlovesushiIlovesushi
wrote...
#1
Posts: 87
Rep: 2 0
3 years ago
Sign in or Sign up in seconds to unlock everything for free
More solutions for this book are available here
1

Related Topics

wrote...
#2
2 years ago
let the rate (r)= K[Ce+4]a [ Ce+3]b [Cr+3]c, a, b and c are orders with respect to Ce+4, Ce+3 and Cr+3 respectively. K is the rate constant

from 2nd data point, 2= K[ 4*10-3]a* [ 2*10-2]b* [3*10-2]c , (1)

from the 3rd data point, 4= K[ 4*10-3]a* [ 1*10-2]b* [3*10-2]c , (2)

Eq.2/Eq.1= 2= (1/2) b= 2-b= 2 , b=-1, the order of reaction with respect to Ce+3.
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  755 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 195
  
 295
  
 317
Your Opinion
Which country would you like to visit for its food?
Votes: 263
Previous poll results: What's your favorite math subject?