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Strong acid
HCL , HBr , HI
H2SO4 , HNO3 , HClO4 , HClO3
Strong bases
LiOH , NaOH , KOH , RbOH , CsOH - G1
Ca(OH)2 , Sr(OH)2 , Ba(OH)2
Soluble Rule 1
Group 1 always soluble
Rule 2
NH4+ ammonium always soluble
Rule 3
NO3 (nitrates) , C2H3O2 (acetates) , ClO4 (perchlorates) all soluble
Rule 4
Cl, Br, I yes unless silver (Ag+), lead(Pb2+), copper(Cu+), or mercury(Hg2 2+)
Rule 5
SO4 2- yes unless calcium(Ca2+), strontium(Sr2+), Barium(Ba2+), silver(Ag+), lead(Pb2+)
Insoluble rule 1
Metal hydroxides except G1, ca, sr, ba
Rule 2
CO3 2- (carbonates), PO4 3-(phosphates), except G1 and ammonium
Sulfur ion
No except G1 and G2 and ammonium