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1) Consider PbI_2(s) dissolving in water. Calculate Ksp if the maximum solubilit

ID: 526269 • Letter: 1

Question

1) Consider PbI_2(s) dissolving in water. Calculate Ksp if the maximum solubility is 0.00130 M. Answer: 8.79 x 10^-9
2) How many grams of KOH (Ksp= 3.0 x 10^-6) will dissolve in 500 mL of 0.040 M Ba(OH)_2(aq)? Answer:1.05 x 10^-3
3) Find the equilibrium constant (K) for the reaction of copper placed in hydrochloric acid at 25 °C understandard conditions. Answer: 3.15 x 10^-12
4) What is the Gibbs free energy for the reaction of metallic sodium added to pure water at 25 °C? Answer: -443.9 kJ/mol

(I know the correct answer, but not the procedure. Thank you for any help!)

Explanation / Answer

1)

Consider PbI_2(s) dissolving in water. Calculate Ksp if the maximum solubility is 0.00130 M

Ksp = [Pb2+] [2* I-]^2

= (0.00130) (2*0.00130)^2

= 8.79*10^-9