English हिन्दी Hinglish اردو

Solubility Table

Click any cell to see the compound formula, solubility status, Ksp value, and the applicable rule

Soluble
Insoluble
Slightly soluble

Click any cell in the table above to see compound details

Solubility Rules

These rules predict whether most common ionic compounds dissolve in water at 25 °C. Memorize them in order — earlier rules take priority.

  1. All common sodium (Na+), potassium (K+), and ammonium (NH4+) salts are soluble.
  2. All nitrates (NO3−) are soluble.
  3. All acetates (CH3COO−) are soluble.
    Exception: Silver acetate (AgCH3COO) is slightly soluble.
  4. All chlorides (Cl−), bromides (Br−), and iodides (I−) are soluble.
    Exceptions: AgCl, AgBr, AgI, PbCl2, PbBr2, PbI2 are insoluble. (Hg2Cl2, Hg2Br2, Hg2I2 also insoluble.)
  5. All sulfates (SO42−) are soluble.
    Exceptions: BaSO4, PbSO4 are insoluble. CaSO4 and SrSO4 are slightly soluble.
  6. Most hydroxides (OH−) are insoluble.
    Exceptions: NaOH, KOH, Ba(OH)2 are soluble. Ca(OH)2 is slightly soluble.
  7. Most carbonates (CO32−), phosphates (PO43−), and sulfides (S2−) are insoluble.
    Exceptions: Those of Na+, K+, NH4+ are soluble.
  8. Most chromates (CrO42−) are insoluble.
    Exceptions: Na2CrO4, K2CrO4, (NH4)2CrO4 are soluble. CaCrO4 is slightly soluble.