Single displacement, double displacement and solubility

Single displacement reaction

A + BC → B + AC

• Take place in aqueous solutions

Solubility

Solute - Substance being dissolved

Solvent - substance in which the solute is dissolved

Water = universal solvent

Double displacement reaction equation

AB + CD → AD + BC

Double displacement to produce a precipitate

a solid is formed in the chemical reaction that takes place in a solution

NOTE: ONE PRODUCT MUST BE AQ AND THE OTHER NEEDS TO BE EITHER SOLID, GAS OR LIQUID IN ORDER FOR THE REACTION TO OCCUR

Double displacement to produce water

Acid + base → Salt + water

CO2 Production

Metal carbonate + acid → Ionic compound (aq) + H2O (l) + CO2 (g)

ex: Na2CO3 (aq) + HCl (aq) → NaCl (aq) + H2O (l) + CO2 (g)

SO2 Production

Metal sulfite + acid → Ionic compound (aq) + H2O (l) + SO2 (g)

ex: Na2SO3 (aq) + HCl (aq) → NaCl (aq) + H2O (l) + SO2 (g)

NH3 Production

Ammonium salt + base → Ionic compound (aq) + H2O (l) + NH3 (g)

ex: NH4Cl (aq) +NaOH (aq) → NaCl (aq) + H2O (l) + NH3 (g)

H2 Production

Ex: CaH2 (aq) + H2O (l) → Ca(OH)2 (aq) + H2 (g)

H2S Production

Metal sulfide + acid → Ionic compound (aq) + H2S (g) (Hydrogen sulfide)

Ex: Na2S (aq) + HCl (aq) → NaCl (aq) + H2S (g)