Question

Calculate reaction quotient. nh4hs(s)⇌nh3(g) h2s(g) at a certain temperature, kc=8.5×10−3 . a reaction mixture at this temperature containing solid nh4hs has [nh3]=0.145m and [h2s]=0.145m.

Answer 1

The reaction quotient (Qc) for the dissociation of NH4HS into NH3 and H2S, with both gases at a concentration of 0.145M is calculated to be 0.021025. since Qc is greater than Kc, the reaction will proceed in the reverse direction to reach equilibrium.

Step-by-step explanation:

When calculating the reaction quotient (Qc) for the dissociation of NH4HS(s) into NH3(g) and H2S(g), we use the concentrations of the gaseous products since the concentration of a solid does not change in the reaction and is not included in the expression. the given equilibrium constant (Kc) for the reaction is 8.5×10⁻³. given that the concentrations of NH3 and H2S in the reaction mixture at this temperature are both 0.145M, we can calculate the reaction quotient Qc using the formula:Qc = [NH3][H2S]

Plugging in the given values, we have: Qc = (0.145)(0.145) = 0.021025

Since the value of Qc is greater than the value of Kc (8.5×10⁻³), the reaction will proceed in the reverse direction to reach equilibrium.