Double Replacement Lab

Double Replacement Reactions Lab

Pre-Lab

1. If a solid, a gas or a weakly ionizing compound such as H2O formed, then a reaction has occurred.

2. The formation of a solid, the formation of a gas and the formation of a weakly ionizing compound are the driving forces that control a double replacement reaction.

3. a. Balanced equation: CaCl2 (aq) + NaPO4 (aq) Ca3(PO4)2 (s) + 6NaCl (aq)

Ionic equation: 3Ca2+(aq) + 6Cl-(aq) + 6Na+(aq) + 2PO43- (aq) Ca3(PO4)2 (s) + 6Na+ (aq) + 6Cl- (aq)

Net ionic equation: 3Ca2+ (aq) + 2PO43- (aq) Ca3(PO4)2 (s)

b. Na2SO (aq) + Cu(NO3)2 (aq) NO REACTION

c. Balanced: 2AgNO3 (aq) + CaCl2 (aq) 2AgCl (s) + Ca(NO3)2 (aq)

Ionic equation: 2Ag+ (aq) + 2NO3- (aq) + Ca2+ (aq) + 2Cl- (aq) 2AgCl (s) + Ca2+ (aq) + 2NO3- (aq)

Net ionic equation: 2Ag+ (aq) + 2Cl- (aq) 2AgCl (s)

d. Balanced equation: BaCl2 (aq) + FeSO4 BaSO4 (s) + FeCl2 (aq)

Ionic equation: Ba2+ (aq) + Cl- (aq) + Fe2+ (aq) + 2SO4- (aq) 2BaSO4 (s) + Fe2+ (aq) + Cl- (aq)

Net ionic equation: Ba2+ (aq) + 2SO4- (aq) 2BaSO4 (s)

| | Reference solutions | | | KCl | Na2SO4 | NaOH | Na2CO3 | Test solutions | SrCl2 | No reaction | Reaction | Reaction | Reaction | | AgNO3 | Reaction | Reaction | Reaction | Reaction | | BaCl2 | No reaction | Reaction | Reaction | Reaction | | MgCl2 | No reaction | No reaction | Reaction | Reaction |
Data

Balanced equations:

SrCl2 (aq) + KCl (aq) NO REACTION
SrCl2 (aq) + Na2SO4 (aq) SrSO4 (s) + 2NaCl (aq)
SrCl2 (aq) + 2NaOH (aq) Sr(OH)2 (s)+ 2NaCl (aq)
SrCl2 (aq) + Na2CO3 (aq) SrCO3 (s) + 2NaCl (aq)

AgNO3 (aq) + KCl (aq) AgCl (s) + KNO3 (aq)
2AgNO3 (aq) + Na2SO4 (aq) Ag2SO4 (s) + 2NaNO3 (aq)
AgNO3 (aq) + NaOH (aq) AgOH (s) + NaNO3 (aq)
2AgNO3 (aq) + Na2CO3 (aq) Ag2CO3 (s) + 2NaNO3 (aq)

BaCl2 (aq) + KCl (aq) NO REACTION
BaCl2 (aq) + Na2SO4 (aq) BaSO4 (s) + 2NaCl (aq)
BaCl2 (aq) + 2NaOH (aq) Ba(OH)2 (s) + 2NaCl (aq)
BaCl2 (aq) + Na2CO3 (aq) BaCO3 (s) + 2NaCl