CHEM 110 Lecture Notes - Lecture 15: Ionic Compound, Chemical Equation, Spectator Ion

• School: Simon Fraser University
• Department: Chemistry
• Course: CHEM 110
• Professor: Jennifer Pore

Document Summary

Recall: ionic compound generally dissolve in water to give an aqueous solution of the whereas a molecule does not dissociate: (aq) + cl- (aq) individual ions: K2so4 (s) 2k+ (aq) + so4 (aq) Recall: ionic compounds generally dissolve in aqueous solution to give the individual ions in solution. The (aq) notation can be left out for the ion form. Molecular compounds that dissolve in water do not dissociate: This equation can also be rewritten in ionic form: (aq) agcl(s) + na+ Ag+ (aq) + no3 (aq) + na+ (aq) + cl- (aq) + no3 (aq) Are unchanged, are not part of the reaction; they are called spectator ions and can be removed (equally) from both sides of the equation. Agcl(s) is not written in ion form as it is a solid (precipitate) in the reaction. Remove spectator ions equally from both sides of the equation. Shows only those species that are directly involved in the reaction.