Chemistry

posted by .

In an experiment, 0.0300 moles each of SO3(g), S02(g), and O2(g) were placed in a 10.0L flask at a certain temperature. When the reaction came to equilibrium, the cocentration of SO2(g) in the flask was 3.50x10^-5 molar. What is Kc for the reaction? 2SO2(g) + O2(g) <--> 2SO3(g)
a. 3.5x10^-5
b. 1.9x10^7
c. 5.2x10^-8
d. 1.2X10^-9
e. 8.2x10^8

The answer is B but i am not sure why

  • Chemistry -

    I change these to M initially = 0.0300mols/10L = 0.00300 M.
    .........2SO2 + O2 ==> 2SO3
    I....0.00300.0.00300..0.00300
    C........-2x.....-x......+2x
    E..0.00300-2x..0.00300-x..0.00300+2x

    At equil (SO2) = 3.5E-5M.
    Therefore, 0.00300-2x = 3.5E-5.
    Solve for x, the calculate concns of the other reactants/products and set up for Kc. b is the correct answer but post your work if you still don't understand how to obtain that answer.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    sulfur trioxide gas dissociates into sulfer dioxide gas and oxygen gas at 1250 degrees C. In an experiment, 3.6 moles of sulfur trioxide were placed into an evacuated 3.0-L flask. THe concentration of sulfur dioxide gas measured at …
  2. chemistry

    An equilibrium mixture of SO2,SO3 and O2 gases is maintained in a 11.5 L flask at a temp at which Kc=55.2 for the rxn shown below. If the number of moles of SO3 in the flask at equilibrium is twice the num of moles of SO2, how much …
  3. ap chem

    At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2 SO2(g) + O2(g) *) 2 SO3(g) What concentration of SO3 would be in equilibrium with 0.250moles of SO2 and 0.578 moles of O2 in a 1.00 liter container at …
  4. chemistry

    An equilibrium mixture of SO2,SO3 and O2 gases is maintained in a 11.5 L flask at a temp at which Kc=55.2 for the rxn: 2SO2 + O2 <> 2SO3. If the # of moles of SO2 and SO3 are =, how many moles of O2 are present?
  5. Chemistry

    Consider the following equilibrium at 1000K: 2SO2 (g) + O2 (g) ¡ê 2SO3 (g) A study of this system reveals that there are 3.5E-3 moles of sulfur dioxide gas, and 4.8E-3 moles of oxygen gas present in a 11.0L flask at equilibrium. …
  6. ap chemistry

    At a certain temperature, the equilibrium constant Kc is 0.154 for the reaction 2 SO2(g) + O2(g) *) 2 SO3(g) What concentration of SO3 would be in equilibrium with 0.250moles of SO2 and 0.853 moles of O2 in a 1.00 liter container at …
  7. chemistry 112

    the formation of SO3 from so2 and o2 is an intermediate step in the manufacture of sulfuric acid, and it is also responsible for the acid rain phenomenon. the equilibrium constant Kp for the reaction is 0.13 at 830 degree celcius. …
  8. Chemistry

    The equilibrium constant is 16 for the gas phase reaction SO2 + NO2 <--> SO3 + NO at a certain temperature. If 3.0 moles each of SO2 and NO2 are placed together in an empty 1.0 liter flask and the system is allowed to come to …
  9. chem

    0.020 mol of each SO2 and O2 and So3 is placed in a 1.0 L flask and allowed to come to equilibrium. The equilibrium of [SO2] is found to be 0.0080M. What is the value of keq for the reaction: 2SO2+O2<----> 2SO3
  10. chemistry

    A mixture of SO3,SO2 and O2 gases is maintained in 10litre flask at which the Kc for reaction is 100 . If number of moles of SO2 and SO3 are equal then how many moles of O2 present.

More Similar Questions