CHEM 1021 Lecture Notes - Lecture 12: Chemical Change, Electrical Resistivity And Conductivity, Formula Unit
Document Summary
Start learning formulas and names for the polyatomic ions in table 3. 4. 1. based on their formulas, which of the following compounds is ionic: hcl, co2, cao, ccl4. Molecular compounds are nonmetals, molecule, solid, liquid or gas at room temp. Some molecular and some ionic compounds dissolve in water. Ionic - breaks into ions, this process in called dissociation. Nacl (aq) --> na^+ (aq) + cl^- (aq) An aqueous solution that conducts an electric current is called electrolytes. Nonelectrolyte - aqueous solution that doesn"t conduct an electric current. Strong electrolyte - breaks completely into ions in aqueous solution. Weak electrolyte - some ions and some intact molecules. Ionization: hcl (aq) + h20(l) --> h30^+ (aq) + cl^- (aq) Dissocation: nacl (aq) --> na^+ (aq) + cl^- (aq) Because it dissolves in water and is an electrolyte. Electrical conductivity is good when compound is molten. Monatomic ions - one element in the ions formula.
