Common Types of Chemical Reactions

  1. Precipitation Reactions: formation of a solid occurs
  2. Acid-Base Reactions: involves a transfer of H+ ions
  • Justify:

          ○ Acid donates a proton & becomes its conjugate base

          ○ Base accepts a proton & becomes its conjugate acid

  1. Oxidation-Reduction Reactions: involves electron transfer & changes in oxidation states

Precipitation Reactions

  • Precipitation reaction: two aqueous solutions are mixed → solution turns cloudy → precipitate forms

         ○ Precipitate: Solid/insoluble product

  • Remember: In virtually every case, when an ionic solid is dissolved in water, the ions separate

         ○ Take the cation from one reactant and combine it with the anion of the other reactant

Solubility Rules (for AP exam memorize first 2)

  • Allow us to predict whether a product forms as a solid.

          ○ (slightly soluble = not)

  1. Nitrate (NO3-) and acetate (C2H3O2) salts are soluble
  2. Alkali (group 1A) salts and NH4+ are soluble




7. Strong acids = soluble (HCl, HBr, HI, HNO, HClO, HSO)

  • When given salts with conflicting info, higher number rules are more important (ex: NaS is soluble)