Answer Happy

9. (15 points) Using 1.0x10-6 M as the quantitative precipitation criterion, if silver ions are added to a solution containing initially 0.050 M I and 0.080 M SCN ions, which of the following statement is correct related to the (i)which ion precipitates first, and the molarities of Ag required (ii)to decrease the concentration of the first precipitated ion to 1.0x10M and (iii)to initiate the precipitation of the second ion? (for Agi Ksp =8.3x10-17, for AgSCN Ksp =1.1x10-12) a) b) c) d) e) (i) I' precipitates first (ii) [ Ag+ ]= 8.3 x 10-11 (iii) [ Agt ]= 1.1 x 10-6 (i) SCN precipitates first (ii) [ Ag+ ]= 1.1 x 10-6 (iii) [ Ag+ ]=1.7 x 10-15 (i) I precipitates first (ii) [ Ag+ ]=8.3 x 10-11 (iii) [ Ag+ ]=1.4 x 10-11 (i) I precipitates first (ii) [ Ag+ ]= 1.7 x 10-15 (iii) [ Agt ]= 1.4 x 10-11 (i) SCN precipitates first (ii) [ Ag+ ]=1.4 x 10-11 (iii) [ Ag+ ]= 1.7 x 10-15