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1
Group 1 and NH4+ these salts are soluble regardless of anion
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2
NO3-, C2H3O2 (acetate), ClO4- are soluble regardless
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3
Cl-, Br-, I- are soluble except Ag+, Pb2+, Hg2+
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4
SO42- are soluble except Ag+, Hg22+, Hg3+, Ca2+, Sr2+, Ba2+
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5
OH-, insoluble except group 1, NH4+, Ca2+, Sr+, Br+
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6
S2- insoluble, except, group 1, NH4+, group 2
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7
oxides O2-, carbonates CO32-, phosphates PO43-, insoluble except group 1, NH4+
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Low density
Group 1 and NH4+ since they are not as compact as others on the right
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High density
Insoluble since they have high charge and small size
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