Question

Need help with question 14 and 15 please:

14.6.5 pts.) A lump of silver carbonate, Ag2CO3, was placed in 450.0 mL of pure water. The Ksp for the dissolution of Ag2CO3.is 8.46 x 10-12 M3 and is described by: Ag2CO3 (s) + 2 Ag+ (aq) + CO32- (aq) After a length of time the equilibrium concentration of Ag+ ion in this solution would be: (a) 1.30 x 10-3 M (belwel7 x 10-3 M (c) 1.30 x 10-4 M (d) 2.57 x 10-4 M 15. (5 pts.) A chemist was working with a sample of 0.128 M HC102. The value of Ka for this acid is 1.10 x 10-2 M. The dissociation of this acid is described by: HClO2 (aq) + H+ (aq) + ClO2- (aq) The % dissociation of the acid in this solution is: (a) 25.4% (b) 19.6% (c) 13.4% (dh. 2247%