Question

Hi. can some one please explain me the solution for this question. the correct answer is C. thanks.

5. The K for barium sulfate is 1.1 x 10 at 25°C. What is the solubility of barium sulfate (in mol L') in 0.1 Miron(III) sulfate solution? a) 1.1 x 10 b) 2.2 x 10" c) 3.7 x 10 d) 5.5 x 10" e) 10 x 10

Answer 1

tet the solubility of Basot be equal to s. Dissolution of Smoll of Basor provides smole IL of Bazt and smole IL ob sode but the SO4 = (0.3+5) moll2 because of sot from Fez (504)3 total concentration of the solution has 0.3 molle fer (304)3 ~ 2feet + 35002 olm 2xo.im 27 Эх о. | М = 0. 3m Basoa at - 2- Ba cas.) + so 4 case) Ksp = [Ba2+] [sot Ksp = (s) (0.3+5) since. Ksp is very small we can neglect s comparison to 0.3. So 0.3+5 = 0.3 in Ksp (s) 0.3 sakse S 0.3 = 1.1810-10 0.3 S = 3.7x10-10 so the solubility of Basoa is s= 3.7 x 1015