1. Calculate K Calculate K_c for the reaction 2HI(g) H_2(g) + I_2(g) given that

Question

1. Calculate K Calculate K_c for the reaction 2HI(g) H_2(g) + I_2(g) given that the concentrations of each species at equilibrium are as follows: [HI] = 0.85 mol/L, [I_2] = 0.60 mol/L, [H_2] = 0.27 mol/L. Sodium carbonate, Na_2CO_3(s), can be prepared by heating sodium bicarbonate, NaHCO_3(s). 2NaHCO_3(s) Na_2CO_3(s) + CO_2(g) + H_2O(g) K_p = 0.23 at 100 degree C If a sample of NaHCO_3 is placed in an evacuated flask and allowed to achieve equilibrium at 100 degree C, what will the total gas pressure be? A. 0.46 atm B. 0.96 atm C. 0.23 atm D. 0.48 atm E. 0.11 atm

Explanation / Answer

1.

Kc = [H2] [I2] / [HI]^2

= (0.27)*(0.60) / (0.85)^2

= 0.224

Answer: 0.224

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