Question: why pbso4 is insoluble in water?
Answer: Why do some salts like PbSO4 and BaSO4 have poor solubility in water (i.e. sparingly soluble)? ... BaSO4 is insoluble in water because of water's dipole strength. Since barium sulphate has strong crystals , water's dipole strength is too weak to pull away the ions (anions and cations) from it.