{
  "version": "2026.05",
  "confidence": "classroom model",
  "cations": {
    "Li": { "ion": "Li+", "charge": 1, "name": "lithium" },
    "Na": { "ion": "Na+", "charge": 1, "name": "sodium" },
    "K": { "ion": "K+", "charge": 1, "name": "potassium" },
    "NH4": { "ion": "NH4+", "charge": 1, "name": "ammonium" },
    "Mg": { "ion": "Mg2+", "charge": 2, "name": "magnesium" },
    "Ca": { "ion": "Ca2+", "charge": 2, "name": "calcium" },
    "Ag": { "ion": "Ag+", "charge": 1, "name": "silver" },
    "Pb": { "ion": "Pb2+", "charge": 2, "name": "lead(II)" },
    "Fe": { "ion": "Fe3+", "charge": 3, "name": "iron(III)" },
    "Fe2": { "ion": "Fe2+", "charge": 2, "name": "iron(II)" },
    "Cu": { "ion": "Cu2+", "charge": 2, "name": "copper(II)" },
    "Mn": { "ion": "Mn2+", "charge": 2, "name": "manganese(II)" }
  },
  "anions": {
    "OH": { "ion": "OH-", "charge": -1, "name": "hydroxide" },
    "Cl": { "ion": "Cl-", "charge": -1, "name": "chloride" },
    "Br": { "ion": "Br-", "charge": -1, "name": "bromide" },
    "I": { "ion": "I-", "charge": -1, "name": "iodide" },
    "NO3": { "ion": "NO3-", "charge": -1, "name": "nitrate" },
    "C2H3O2": { "ion": "C2H3O2-", "charge": -1, "name": "acetate" },
    "CH3COO": { "ion": "CH3COO-", "charge": -1, "name": "acetate" },
    "HCO3": { "ion": "HCO3-", "charge": -1, "name": "bicarbonate" },
    "SO4": { "ion": "SO4^2-", "charge": -2, "name": "sulfate" },
    "CO3": { "ion": "CO3^2-", "charge": -2, "name": "carbonate" },
    "PO4": { "ion": "PO4^3-", "charge": -3, "name": "phosphate" },
    "MnO4": { "ion": "MnO4-", "charge": -1, "name": "permanganate" },
    "CrO4": { "ion": "CrO4^2-", "charge": -2, "name": "chromate" }
  }
}