Question

when the Ksp for AlPO, is 9.84 10 and the Kyfor the AMEDTA) complex ion is 1.310 19. The Kr f for the complex ion Ni(NHs) is 2.0x10. Analysis shows a solution at equilibrium contains hjc"] = 0.0016 M. INHi-0.98 M, and [N产] = 9.03x10-2 M. what concentration of sulfide [Ni(N tart the precipitation of NiS(s) from the solution, if the Kse value is 3.0x1020 for NiS? 20. Decreasing the activity coefficients will increase the solublity of a solid in a solubility equilibrium. Which of these factors will decrease the activity coefficients? b) decrease the hydrate ion size d) increase the ion charge a) increase the temperature c) increase the ionic strength of solution e) increase the pH f add a common ion Choices 21. & 22. A chemist titrates 25.0 mL of 0.00100 M I solution with 0.000500 M Ag'. it takes 50.0 mL of titrant to reach the equivalence point. The Kip 8.3x107 for Agl solid. What is the [I] value when the added titrant volume is 49.0mL? What is the [Ag'] value when the added titrant volume is 49.0mL? a. b.

please solve 20 and 21!!!

Answer 1

case nh decacajc in Hyckated on site Le d) indeak ta ion chage = 9.IXIO exe poin

Bejde ta Squivelente poini C) (o.00100M) (0.025い-(0.000500 M)10.040 LJ d J. moles -6 finding new נ-(onente é moles Co 06) PA