Equilibrium constant

  • Thread starter carrera901
  • Start date
Hey all

I have trouble understanding something about the Equilibrium constant.

If you have this chemical equilibrium:

pA + qB [tex]\Leftrightarrow[/tex] rC + sD

You can define the equilibrium constant with

[C]r [D]s
______ = K
[A]p q

I don't understand why you multiply the concentrations, can anyone explain?

I'm very sorry if this is a very dumb question and sorry for my english

And no idea why the arrow goes up :-p
 

Borek

Mentor
28,038
2,550
Use LaTeX

[tex]K = \frac {[A]^p^q} {[C]^r[D]^s} [/tex]

I am not sure what you are asking about.

Are you asking why it is defined this way? Because it was defined this way :smile:

Are you asking why it works? That's a much better question. As a first approximation you may assume that's because to react molecules have to collide and amount of collisions is directly proportional to the concentration.

--
 

Related Threads for: Equilibrium constant

  • Posted
Replies
1
Views
3K
  • Posted
Replies
8
Views
6K
  • Posted
Replies
9
Views
6K
Replies
1
Views
1K
  • Posted
Replies
2
Views
1K
  • Posted
Replies
7
Views
3K
Replies
1
Views
3K
Replies
16
Views
5K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top