{
  "version": "2026.05",
  "confidence": "classroom model",
  "rules": [
    "Group 1 and ammonium salts are soluble.",
    "Nitrates, acetates, chlorates, and perchlorates are treated as soluble.",
    "Chlorides, bromides, and iodides are usually soluble except with Ag+ and Pb2+.",
    "Sulfates are usually soluble except with Ba2+, Pb2+, Sr2+, and Ca2+.",
    "Carbonates, phosphates, sulfites, sulfides, and most hydroxides are low-solubility except with Group 1 and ammonium."
  ],
  "referencePrecipitates": [
    { "solid": "AgCl(s)", "ksp": 1.8e-10, "molarMass": 143.32, "color": "white" },
    { "solid": "PbI2(s)", "ksp": 7.9e-9, "molarMass": 461.0, "color": "yellow" },
    { "solid": "CaCO3(s)", "ksp": 3.3e-9, "molarMass": 100.09, "color": "white" }
  ]
}