ALEKS. Learn-mxG0EM 1100 Found Lectures-CHEM cli Secure) https:/ xer OEM 1100 Fa

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ALEKS. Learn-mxG0EM 1100 Found Lectures-CHEM cli Secure) https:/ xer OEM 1100 Fan xen cgix/lsl.exe/u-igNskr 8P3/H-UjTgkogHgDFG-hhI7LCmFKBGScXhEWOILTYFEOB-kqS -, Calculating equilibrium composition from an equilibrium constant Suppose a 500, ml. flask is filed with 0.30 mol of C2 and 0.20 mol of HCL The following reaction becomes possible: H28)+CI 2HCI(g) The equilibrium constant K for this reaction is 0.397 at the temperature of the flask. Calculate the equilibrium molarity of H2. Round your answer to two decimal places Check MacBook Air

Explanation / Answer

molarity of Cl2 = no of moles/volume in L
                 = 0.3/0.5 = 0.6 M
molarity of HCl   = no of moles/volume in L
                  = 0.2/0.5 = 0.4
          H2(g) + Cl2 ------> 2HCl(g)
I          0       0.6         0.4
C          +x       +x          -2x
E           +x      0.6+x      0.4-2x

    K   = [HCl]^2/[H2][Cl2]
    0.397 = (0.4-2x)^2/x*(0.6+x)
    0.397*x*(0.6+x) = (0.4-2x)^2
     x = 0.11
    [H2] =x = 0.11 M

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