Results are out! Find what you need...fast. Get quick advice or join the chat
Hey there Sign in to join this conversationNew here? Join for free

Kc Question troubles!

Announcements Posted on
    • Thread Starter
    • 4 followers
    Offline

    ReputationRep:
    Here's the q:

    N2O4 and NO2 coexist in this equilibrium..

    2 NO2 <--=--> N2O4

    A chemist adds 4.00mol no2 to a container with a volume of 2dm3. The container is sealed, heated to a constant temp and allowed to reach equilibrium.

    the equilibrium mixture contains 3.2mol no2. Calculate Kc under these conditions.

    I understand everything up to the point where reacting ratio is 2:1 and that concentration of no2 is 1.6mol dm3. So I thought that the conc. of N2O4 would be 0.8, but markscheme says its 0.2. Why is this??
    • 48 followers
    Offline

    ReputationRep:
    0.8 mol of NO2 has reacted, which means 0.4 mol of N2O4 is present according to the ratio in the chemical equation. Convert moles into concentration and it should be obvious :yes:

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?
  2. this can't be left blank
    this email is already registered. Forgotten your password?
  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide to join now Processing…

Updated: June 8, 2012
New on TSR

Have a UCAS application question?

Post it in our dedicated forum

Article updates
Reputation gems:
You get these gems as you gain rep from other members for making good contributions and giving helpful advice.