Question

Predict whether the compounds are soluble or insoluble in water. 

Soluble Insoluble 

CuBr₂ NH₄Br Pb(NO₃)₃ Agl NICO₃ BaSO₄ 

Answer 1

Soluble : CuBr2 , Pb(NO3)2, NH4Br

Insoluble : NiCO3, AgI, BaSO4

Explanation

Solubility rules

Salts of elements of group1 of periodic table ( Li, Na , K, Rb and Cs) are soluble

Salts of ammonium ion(NH4⁺) are soluble

Salts of Nitrate ion ( NO3^-​​​​​​) are soluble

Salts of halide ions ( F^-, Cl^-, Br^-, I^-) are generally soluble, expections are halide salts of Ag , Pb, Hg₂⁺ are insoluble

Salts of sulphate ion( SO₄^2- ) are generally soluble, exceptions are CaSO4 , PbSO4 , BaSO4

Salts of carbonate ion( CO3^2-) are generally insoluble

Salts of phosphate ions(PO4^3-) are generally insoluble

Salts of sulphides ions ( S^2-) are generally insoluble

Salts of hydroxide (OH^-) are insoluble.