40 ELECTROLYTES AND NON-ELECTROLYTES CHM 1045L/CHM 1046L NAMEDATA SHEET 2 STD #

Question

40 ELECTROLYTES AND NON-ELECTROLYTES CHM 1045L/CHM 1046L NAMEDATA SHEET 2 STD # DATE SEQUENCE # TYPICAL IONIC REACTIONS 2a. 0.1M HCI with 0.1M NaOH. (Meter Reading) HCI NaOH Mixture 12 2 1c Total ionic equation for reaction Net ionic equation for reaction 2b. 0.1M H2so4 with 0.1M Ba(OH)2. (Meter Reading) Conductivity At End Point H2SO4 Ba(OH)2 2 8 5 Total ionic equation for reaction Net ionic equation for reaction 2c. 0.1M HC2H3O2 with 0.1M NH OH (Meter Reading) Mixture NH4OH e1 Total ionic equation for reaction Net ionic equation for reaction

Explanation / Answer

2a) HCl and NaOH are both strong electrolytes and dissociate in aqueous solution; the products of the reaction are NaCl (again a strong electrolyte which dissociates completely) and H2O (a non-electrolyte).

Total ionic equation for the reaction:

H+ (aq) + Cl- (aq) + Na+ (aq) + OH- (aq) --------> Na+ (aq) + Cl- (aq) + H2O (l)

Net ionic equation for the reaction:

Cancel out the common ions from both sides and write

H+ (aq) + OH- (aq) --------> H2O (l)

2b) H2SO4 and Ba(OH)2 are both strong electrolytes and dissociate in aqueous solution; the products of the reaction are BaSO4 (insoluble in aqueous medium) and H2O (a poor electrolyte; doesn’t dissociate in aqueous medium).

Total ionic equation for the reaction:

2 H+ (aq) + SO42- (aq) + Ba2+ (aq) + 2 OH- (aq) -------> BaSO4 (aq) + 2 H2O (l)

Net ionic equation for the reaction:

The net ionic equation is the same as the total ionic equation, since the reaction produces an insoluble salt and a poor electrolyte.

2c) HC2H3O2 and NH4OH dissociate in aqueous medium to produce NH4C2H3O2 (dissociates into ions) and H2O (a poor electrolyte).

Total ionic equation for the reaction:

H+ (aq) + C2H3O2- (aq) + NH4+ (aq) + OH- (aq) --------> NH4+ (aq) + C2H3O2- (aq) + H2O (l)

Net ionic equation for the reaction:

Cancel out the common ions from both sides and write

H+ (aq) + OH- (aq) --------> H2O (l)

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