. A sample of hydrogen fluoride is placed in a 1.00 L container. At equilibrium, the concentration of HF (g) was 0.700 mol/L. The equilibrium constant for the formation of hydrogen fluoride gas is 114. H2(g) +F2(g) 2 HF (g) Keq = 114 a) What is the concentration of H2(g) and F2(g) at equilibrium? b) What was the initial concentration of HF (g)?