Chemical Forums

Please login or register.

Login with username, password and session length

Sponsored links

Pages: [1]   Go Down

Author Topic: Equilibrium Constants Problem  (Read 388 times)

0 Members and 1 Guest are viewing this topic.

kraver0

  • New Member
  • **
  • Mole Snacks: +0/-0
  • Offline Offline
  • Posts: 3
Equilibrium Constants Problem
« on: November 29, 2012, 04:52:11 PM »

I apologize for posting another question after posting the previous question 30 minutes ago... But this will be my last question.. I promise.

Here's the problem:

At a certain temperature the following have their equilibrium constants given below:

S(s) + O_2 (g) <---> SO_2 (g)          Kc1 = 4.2E+52
2S(s) + 3O_2 (g) <---> 2SO_3 (g)     Kc2 = 9.8E+128

Calculate the equilibrium constant Kc for the reaction below at the same temperature:

2SO_2 (g) + O_2 (g) <---> 2SO_3 (g)

Could someone please help me with this problem? Thanks.

Note:
I have absolute no idea on how to solve this. This problem was from a quiz, and pretty much three-fourths of the students in my lecture class got this problem wrong. Funny thing is that my TA (teacher assistant) doesn't even know how to solve this. I could've asked my professor, but he's always asking other students questions before I could get him my attention.
Logged

curiouscat

  • Chemist
  • Sr. Member
  • *
  • Mole Snacks: +107/-30
  • Offline Offline
  • Posts: 2572
Re: Equilibrium Constants Problem
« Reply #1 on: November 29, 2012, 06:22:30 PM »

What are the eqns. you know.
Logged

Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Mole Snacks: +1380/-370
  • Offline Offline
  • Gender: Male
  • Posts: 21150
  • I am known to be occasionally wrong.
    • Chembuddy
Re: Equilibrium Constants Problem
« Reply #2 on: November 29, 2012, 10:08:25 PM »

As curiouscat hinted: write equations for all three K, then see if you can express Kc using Kc1 and Kc2.
Logged
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info
Pages: [1]   Go Up
 

Mitch Andre Garcia's Chemical Forums 2003-Present.

Page created in 0.073 seconds with 23 queries.