Nitrates (NO₃^– )

perchlorates (ClO₄^– )

Fluorides (F^–)

Chlorides, bromides and iodides

Sulfates (SO₄^2–)

Acetates (CH₃CO₂^– )

None  

None  

Mg²⁺,Ca²⁺,Sr²⁺,Ba²⁺,Pb²⁺

Ag⁺,Hg₂⁺,PbI₂,CuI,HgI₂

Sr²⁺, Ba²⁺, Pb²⁺

None

None  

None  

None  

PbCl₂, PbBr₂

Ca²⁺, Ag⁺, Hg₂²⁺

Ag⁺, Hg₂²⁺

Exceptions

Phosphates (PO₄^2–)

Sulfides (S^2–)
  

Hydroxides (OH^–)

Na⁺, K⁺, and NH₄⁺

Na⁺, K⁺, and NH₄⁺, Mg²⁺Ca²⁺

Na⁺, K⁺, and NH₄⁺, Ba²⁺ 

None   

None   

Ca²⁺,Sr²⁺