• Some combinations of aqueous reactants result in the formation of a solid precipitate as a product.
  • If solutions of sodium nitrate and ammonium chloride are mixed, no reaction occurs.
  • Every ion is a spectator ion and there is not net ionic equation at all.
  • It is useful to be able to predict when a precipitate will occur in a reaction.
  • To do so, you can use a set of guidelines called the solubility rules (see Table below).Solubility Rules for Ionic Compounds in Water.
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