Suppose a 1.00 L nickel reaction container filled with 0.0057 M H_2 is connected

Question

Suppose a 1.00 L nickel reaction container filled with 0.0057 M H_2 is connected to a 4.00 L container filled with 0.069 M F_2. Calculate the molar concentration of H_2 at equilibrium. A hint is provided after the first attempt in the feedback. When you do the limiting reactant calculation you essentially use up all the limiting reactant. So, hydrogen concentration is approximately zero. But, it can't be identically equal to zero or the K_eq expression can not be correct. You will find how small it really is.

Explanation / Answer

H2 + F2 <--------> 2HF

Method 1:

Equilibrium concentration of H2 = M1V1/ (V1+ V2)

= 0.0057 x 1.0 L / ( 1.0 L + 4.0 L)

= 1.14 x 10-3 M

(or)

Method 2 :

In this method, we need value of equilibrium constant Kc.

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