Write both Kc and kp for the following reversible reactions: (wdp pg. 738) 2SO2(g) + O2(g) ↔ 2SO3(g) 2NH3(g) + H2SO4(l) ↔ (NH4)2SO4(s) S(s) + H2SO3(aq) ↔ H2S2O3(aq)
Do you mean the expressions for Kc and Kp. Without numbers, there is no way to calculate the value of either.
2SO2(g) + O2(g) ↔ 2SO3(g)
Kc = (SO3)^2/(SO2)^2(O2)
Kp = p^2SO3/p^2SO2*pO2
2NH3(g) + H2SO4(l) ↔ (NH4)2SO4(s)
S(s) + H2SO3(aq) ↔ H2S2O3(aq)
Same procedure followed for the others; however, remember to use only gases and aqueous solution for kc and use only gases for Kp.
To write the equilibrium constant expressions (Kc and Kp) for reversible reactions, we need to follow a few steps:
Step 1: Write the balanced equation for the reaction.
For the first reaction: 2SO2(g) + O2(g) ↔ 2SO3(g)
For the second reaction: 2NH3(g) + H2SO4(l) ↔ (NH4)2SO4(s)
For the third reaction: S(s) + H2SO3(aq) ↔ H2S2O3(aq)
Step 2: Write the expression for Kc (equilibrium constant in terms of molar concentrations).
Kc is calculated by taking the molar concentration of the products divided by the molar concentration of the reactants, each raised to the power of their respective stoichiometric coefficient.
For the first reaction:
Kc = [SO3]^2 / ([SO2]^2 * [O2])
For the second reaction:
Kc = [(NH4)2SO4] / ([NH3]^2 * [H2SO4])
For the third reaction:
Kc = [H2S2O3] / ([S] * [H2SO3])
Step 3: Write the expression for Kp (equilibrium constant in terms of partial pressures).
Kp is calculated by taking the partial pressure of the products divided by the partial pressure of the reactants, each raised to the power of their respective stoichiometric coefficient.
To calculate Kp, we need the balanced equation and the gas constant R. The value of R depends on the units used for the partial pressures.
Step 4: Determine the units and values for Kp.
Since we do not have the information about the units or values of partial pressures, we cannot calculate Kp without additional data. Kp expressions cannot be obtained solely from a balanced equation.
In summary:
For the first reaction:
Kc = [SO3]^2 / ([SO2]^2 * [O2])
Kp = additional data needed
For the second reaction:
Kc = [(NH4)2SO4] / ([NH3]^2 * [H2SO4])
Kp = additional data needed
For the third reaction:
Kc = [H2S2O3] / ([S] * [H2SO3])
Kp = additional data needed