Question

A) 10x10 mol/L of BaCl2 are added to a saturated BaSO4 solution. Given that the solubility product constant of barium sulfate is 1.2x10-10 find the equilibrium concentrations of Ba2+ and SO42- ions after the addition of BaCl2. B) The pH of an originally acidic solution containing 10-3 CaCl2 and 10-1 M oxalic acid (H2C204) is raised slowly. At what pH value will calcium oxalate (CaC204) first precipitate? ( Assume that CaCl2 completely dissociates into its constituent ions) Ksp (Ca C204) = 10-8.72 Kai = 10-1.19 Ka.2 = 10-4.21

Answer 1

- Giren Basoa Ba2+ + sop²- Ksp= [Ba2+][s042-] Kspa sig > ks pz 57.= 1,2210-10 Gillen that common in [Ba2+] is added. the cone q (Rack] = [Ba² new = 10x10m ..[5047 1. ksp 1.2x1610 newz - [Razt new = 12x106 10X165 10x15 -- [882) 1-2 2166M = ($04? Jeg : [Ba2+3new = 10x10$M = (kalt/eq.

As per the rules, i have solved one problem.

Thanks.