Chem

posted by .

Consider 1.40 mol of carbon monoxide and 3.20 mol of chlorine sealed in a 8.00 L container at 476 oC. The equilibrium constant, Kc, is 2.50 (in M-1) for

CO(g) + Cl2(g) ↔ COCl2(g)

Calculate the equilibrium molar concentration of CO.

So I tried this question by finding the equilibrium concentrations then using the quadratic equation to get .187 which wasn't right. Help?


Chemists studied the formation of phosgene by sealing 0.74 atm of carbon monoxide and 0.92 atm of chlorine in a reactor at a certain temperature. The pressure dropped smoothly to 1.36 atm as the system reached equilbrium. Calculate Kp (in atm-1) for

CO(g) + Cl2(g) ↔ COCl2(g)

I found the final pressure of the gases to get 94.44 which was really off because I think the answer is supposed to be either single digits or a decimal. Please help!

Thanks in advance!

  • Chem -

    1.40 mol/8.0 L = 0.175M = (CO)
    3.20 mol/8.0L = 0.400 M = (Cl2)

    ............CO + Cl2 ==> COCl2
    I........0.175...0.400.....0
    C..........-x.....-x.......x
    E.......0.175-x..0.400-x....x

    Kc = 2.5 = (COCl2)/(CO)(Cl2).
    Solve for x.
    If you will post your work I will find the error. You know 0.187 can't be right; that's more CO than you started with.

    .........CO + Cl2 ==> COCl2
    I.......0.74..0.92.....0
    C........-p....-p.......p
    E.....0.74-p.0.92-p.....p

    Ptotal = 1.36 = 0.74-p + 0.92-p + p
    Solve for p = 0.30 and substitute into Kp expression. Solve for Kp.

  • Chem -

    thank you!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    can you explain me how to do this question. any help would be much appreciated. 1) If 0.025 mol of COCl2(g) is placed in a one liter container at 400c, 16.0% of the CoCl2 is dissociated when equilibrium is established. COCl2(g)-> …
  2. chem

    Hydrogen and carbon dioxide react at a high temperature to give water and carbon monoxide. H2(g) + CO2(g) --> H2O(g) + CO(g) (a) Laboratory measurements at 986°C show that there are 0.11 mol each of CO and H2O vapor and 0.087 mol …
  3. Chem 101

    At 600degrees Celcius, gaseous CO and Cl2 are mixed together in a 1.00 L closed container. At the instant they are mixed, their concentrations are CO=.25 mol/L and Cl2= .69 mol/L. After equilibrium is established, their concentrations …
  4. Chemistry

    Need help in AP chemistry on Equilibrium When heated, hydrogen sulfide gas decomposes according to the equation 2 H2S(g) ⇄ 2 H2(g) + S2(g) A 3.40 g sample of H2S(g) is introduced into an evacuated rigid 1.25 L container. The …
  5. Chemistry

    A 1.00 L flask containing the equilibrium mixture CO +Cl2 <-> COCl2 was found to contain 0.400 mol of COCl2, 0.100 mol of CO, and 0.500 mol of Cl2. If 0.300 mol of CO is added at constant temperature, what will be the new concentrations …
  6. Chemistry

    An equilibrium mixture contains 0.250 mol of each of the products (carbon dioxide and hydrogen gas) and 0.200 mol of each of the reactants (carbon monoxide and water vapor) in a 1.00-L container. CO(g) + H2O(g) <-> CO2(g)+ H2(g) …
  7. Chemistry

    Consider the equilibrium 2NO (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations …
  8. Chemistry

    Consider the equilibrium 2NOCl (g) <---> 2NO (g) + Cl2 (g). In a 1 L container @ equilibrium there are 1.0 mol NOCL, 0.70 mol NO, and 0.40 mol Cl2. @ constant temperature and volume, 0.10 mol NaCl is added. What are the concentrations …
  9. HARD CHEM QUESTION- any help appreciated

    Phosgene (COCl2) is a poisonous gas that dissociates at high temperature into two other poisonous gases, carbon monoxide and chlorine with equilibrium constant Kp = 0.0041 at 600 K. Find the equilibrium composition of the system after …
  10. chem 12

    consider the following equilibrium 2NOCl(g)--- 2 NO(g) + Cl2(g) Initally 1.00 mol of NO and 1.00 mol of Cl2 are placed in a 5.00L container. Calculate the initial concentrations of NOCl, NO and Cl2 NO= 0.20 mol/L Cl2= 0.20 mol/l NOCl=0 …

More Similar Questions