Solubility of AgCl

Illustration showing the solubility of AgCl, SAgCl, as a function of pCl. The dashed red line shows SAgCl if one assumes incorrectly that the only relevant reaction is

AgCl(s) ↔ Ag+(aq) + Cl(aq)

The solid blue curve is the actual solubility when considering additional reactions forming soluble silver-chloro complexes

Ag+(aq) + Cl(aq) ↔ AgCl(aq)

AgCl(aq) + Cl(aq)  AgCl2(aq)

AgCl2(aq) + Cl(aq) ↔AgCl32–(aq)

Because the solubility of AgCl spans several orders of magnitude, SAgCl is displayed on the y-axis in logarithmic form.


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