Question

Please show work

Consider the following Gibbs energies at 25 degree C. calculate delta G degree _rxn for the dissolution of AgCl(s). Calculate the solubility-product constant of AgCl. Calculate delta G degree_rxn for the dissolution of AgBr(s). Calculate the solubility-product constant of AgBr.

Answer 1

a) AgCl $\rightarrow$ Ag⁺  + Cl^-

$\Delta$ G_{rxn⁰  = 77.1-131.2 + 109.8 = 55.7}

b) $\Delta$ G = $\Delta$ G₀  + RTln(K)

$\Delta$ G = 0 at the equlribium

K = exp(- $\Delta$ G₀/RT)

K = 1.726 x 10^-10

c) AgBr $\rightarrow$ Ag⁺ + Br^-

$\Delta$ G_rxn⁰= 77.1-104 +96.9 = 70

d) $\Delta$ G = $\Delta$ G₀  + RTln(K)

$\Delta$ G = 0 at the equlribium

K = exp(- $\Delta$ G₀/RT)

K = 5.384 x 10^-13