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 (aq)

MgCl2 (aq) + KCl (aq) NO REACTION
MgCl2 (aq) + Na2SO4 (aq) NO REACTION
MgCl2 (aq) + 2NaOH (aq) Mg(OH)2 (s) + 2NaCl (aq)
MgCl2 (aq) + Na2CO3 (aq) MgCO3 (s) + 2NaCl (aq)

Ionic equations:

Sr2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Sr2+ (aq) + Cl- (aq) + Na+ (aq) + SO42- (aq) SrSO4 (s) + 2Na+ (aq) + 2Cl- (aq) Sr2+ (aq) + Cl- (aq) + 2Na+ (aq) + 2OH- (aq) Sr(OH)2 (s) + 2Na+ (aq) + 2Cl- (aq) Sr2+ (aq) + Cl- (aq) + Na+ (aq) + CO32- (aq) SrCO3 (s) + 2Na+
(aq) + 2Cl- (aq)

Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) AgCl (s) + K+ (aq) + NO3- (aq) 2Ag+ (aq) + 2NO3- (aq) + Na+ (aq) + SO42- (aq) Ag2SO4 (s) + 2Na+ (aq) + 2Cl- (aq) Ag+ (aq) + NO3- (aq) + Na+ (aq) + OH- (aq) AgOH (s) + Na+ (aq) + NO3-(aq) 2Ag+ (aq) + 2NO3- (aq) + Na+ (aq) + CO32- (aq) Ag2CO3 (s) + 2Na+ (aq) + 2NO3-(aq)

Ba2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Ba2+ (aq) + Cl- (aq) + Na+ (aq) + SO42- (aq) BaSO4 (s) + 2Na+ (aq) + 2Cl- (aq) Ba2+ (aq) + Cl- (aq) + 2Na+ (aq) + 2OH- (aq) Ba(OH)2 (s) + 2Na+ (aq) + 2Cl-(aq) Ba2+ (aq) + Cl- (aq) + Na+ (aq) + CO32- (aq) BaCO3 (s) + 2Na+ (aq) + 2Cl- (aq)

Mg2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Mg2+ (aq) + Cl- (aq) + Na+ (aq) + SO42- (aq) NO REACTION
Mg2+ (aq) + Cl- (aq) + 2Na+ (aq) + 2OH- (aq) Mg(OH)2 (s) + 2Na+ (aq) + 2Cl-(aq) Mg2+ (aq) + Cl- (aq) + Na+ (aq) + CO32- (aq) MgCO3 (s) + 2Na+ (aq) + 2Cl- (aq)

Net ionic equations & Precipitates formed:

Sr2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Sr2+ (aq) + SO42- (aq) SrSO4 (s) Strontium sulfate
Sr2+ (aq) + 2OH- (aq) Sr(OH)2 (s) Strontium hydroxide
Sr2+ (aq) + CO32- (aq) SrCO3 (s) Strontium carbonate

Ag+ (aq) + Cl- (aq) AgCl (s) Silver chloride
2Ag+ (aq) + SO42- (aq) Ag2SO4 (s) Silver sulfate
Ag+ (aq) + OH- (aq) AgOH (s) Silver hydroxide
2Ag+ (aq) + CO32- (aq) Ag2CO3 (s) Silver carbonate

Ba2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Ba2+ (aq) + SO42- (aq) BaSO4 (s) Barium sulfate
Ba2+ (aq) +2OH- (aq) Ba(OH)2 (s) Barium hydroxide
Ba2+ (aq) + CO32- (aq) BaCO3 (s) Barium carbonate

Mg2+ (aq) + Cl- (aq) + K+ (aq) + Cl- (aq) NO REACTION
Mg2+ (aq) + Cl- (aq) + Na+ (aq) + SO42- (aq) NO REACTION
Mg2+ (aq) +2OH- (aq) Mg(OH)2 (s) Magnesium hydroxide
Mg2+ (aq) + CO32- (aq) MgCO3 (s) Magnesium carbonate