Homework Help: chemistry

Posted by Thomas on Sunday, March 30, 2008 at 9:49pm.

When carbon dioxide is heated in a closed container, it decomposes into carbon monoxide and oxygen according to the following equilibrium equation:
2CO2(g) ---> 2CO(g) + O2(g)

When 2.0 mol of CO2(g) is placed in a 5.0-L closed container andheated to a particular temperature, the equilibrium concentration of CO2(g) is measured to be 0.039 mol/L. Use an ICE table to determine the equuilibrium concentrations of CO(g) and O2(g)

chemistry - DrBob222, Sunday, March 30, 2008 at 10:05pm
It's difficult to do spacing on these boards but if I turn the equation down instead of sideways, we may be able to do it. First will be I, followed by C and E horizontally. Let me know if this is too confusing. (First, (CO2) = 2.0 mols/5 L = 0.4 mols/L.
2CO2(g) 0.4 -2x 0.039
|
|
v
2CO(g) 0 +2x
+
O2(g) 0 +x
If equilibrium for CO2 is 0.039 and it was 0.4 initially, that means it must have changed by 0.4 - 0.039 = 0.361 and that is 2x. Then CO must be the same and O2 must be 1/2 that.
- chemistry - Marcus, Sunday, March 30, 2008 at 10:14pm
  Calculate the solubility of zinc hydroxide at 25 °C. The Ksp of Zn(OH)2(s) is 4.5 x 10^-17 at 25 °C?
  
  What did I do wrong?
  
  Zn(OH)2 <----> Zn2+ + 2 OH-
  
  let x = moles/L of Zn(OH)2 that dissolve. This gives us x moles/L of Zn2+ and 2x moles / L of OH-
  [Zn2+] = x
  [OH-] = 2x
  
  Ksp = [Zn2+][OH-]^2 = x ( 2x)^2 = 4x^3
  
  4.5 x 10^-17 = 4x^3
  
  x = molar solubility = 2.2 x 10^-6 M
  - chemistry - DrBob222, Sunday, March 30, 2008 at 10:40pm
    2.2 x 10^-6 M looks ok to me. Perhaps they want g/L instead of mols/L.

Answer this Question

Related Questions

chemistry - When carbon dioxide is heated in a closed container, it decomposes ...
#2 chemistry - 2CO(g) + O2(g) ==> 2CO2(g) A. If 16.01 L of oxygen is ...
Chemistry - An equilibrium mixture contains 0.250 mol of each of the products (...
Chemistry - Just having some trouble with this chemistry problem.. Thanks for ...
chemistry - Given 1.115 atm of carbon monoxide reactimg with 1.553 atm of oxygen...
Chemistry - "Given that the bond enthalpy of the carbon-oxygen bonds in ...
chemistry - What volume (in Liters) of oxygen must react to form 17.0L of carbon...
Chemistry - when heated, sodium bicarbonate, NaHCO3, decomposes into sodium ...
Chemistry - when heated, sodium bicarbonate, NaHCO3, decomposes into sodium ...
chemistry - need formula to this. Carbon monoxide reacts with oxygen to produce ...

For Further Reading

First Name:
School Subject:
Answer: