Double Displacement Reaction

• Soluble

  1. All common inorganic Acids (lack carbon atoms)
  2. All alkali metal compounds
  3. All compounds of nitrate (NO₃⁻¹), chlorate (ClO₃⁻¹), acetate (C₂H₃O₂⁻¹), and perchlorate (ClO₄⁻¹)
  4. All ammonium (NH₄⁺¹) compound
  5. Most compounds of chloride (Cl⁻¹), bromide (Br¹), iodine (I⁻¹), and fluoride (Fl⁻¹)
  6. exceptions: compound of Ag⁺¹, Cu⁺¹, Pb⁺², Hg₂⁺²
  7. 6. Most compound of sulfate (SO₄²)
  8. A. exceptions: compounds of Ca⁺², Sr⁺², Ba⁺², Pb⁺², and Hg⁺²
• Insoluble:

  1. Most metallic hydroxide
  2. Exceptions: hydroxide of alkali metals and Ba⁺²
  3. Most compounds of carbonate (CO⁻²), phosphate (PO⁻³), and sulfate (SO⁻²)
  4. Exceptions: compounds of alkali metals and NH₄⁺¹
  5. Most compounds of sulfide (S⁻²)
  6. Exceptions: compounds of group IA, group IIA, and NH₄⁺¹
• general equations:

  AB + CD → AD + CB
• predicted product are both soluble or both insoluble = no reaction