Which оf the fоllоwing solid compounds is insoluble in wаter? This is the аctivity series from Chаpter 7 Li > K > Ba > Sr > Ca > Na > Mg > Al > Mn > Zn > Fe > Cd > Co > Ni > Sn > Pb > (H) > Cu > Ag > Hg > Au This is the list of solubility rules from Chapter 7 Ionic compounds containing the following ions are generally soluble in water 1. alkali metal ions and the ammonium ion, Li+, Na+, K+, NH4+ 2. acetate ion, C2H3O2- 3. nitrate ion, NO3- 4. halide ions (X = Cl-, Br-, I- ) (AgX, Hg2X2, and PbX2 are exceptions and insoluble) 5. sulfate ion, SO42- (SrSO4, BaSO4, and PbSO4 are exceptions and insoluble) Ionic compounds containing the following ions are generally insoluble in water 6. carbonate ion, CO32- (See rule 1 exceptions, which are soluble) 7. chromate ion, CrO42- (See rule 1 exceptions, which are soluble) 8. phosphate ion, PO43- (See rule 1 exceptions, which are soluble) 9. sulfide ion S2- (CaS, SrS, BaS, and rule 1 exceptions are soluble) 10. hydroxide ion, OH- [Ca(OH)2 , Sr(OH)2 , Ba(OH)2 , and rule 1 exceptions are soluble)