Net Ionic Equations Double Replacement Redox Single Replacement
Net Ionic Equations Double Replacement Redox / Single Replacement Composition/Decomposition Complex Ions Combustion
Identification of Double Replacement Reaction n Acid / Base NH 3 + HF NH 4+ + F – n Precipitation Ba 2+ + SO 42 - Ba. SO 4 n Both 2 H+ + SO 42 - + Ca(OH)2 Ca. SO 4 + 2 HOH
Redox and Single Replacement Redox n n n Use of key terms Mn. O 4 - H 2 O 2 Cr 2 O 72 - HNO 3 Elements with multiple oxidation states Sn 2+ Sn 4+ Cr 2+ Cr 3+ Cr 6+ I- IO 2 O(-1 or -2) Acidic and Basic conditions 4 Mn. O 4 - + 12 H+ + 20 H 2 O 2 4 Mn 2+ + 15 O 2 + 26 H 2 O
Redox / Single Replacement n Like will replace like 2 Na + 2 H 2 O 2 Na+ + 2 OH- + H 2 Cl 2 + 2 KI 2 K+ + 2 Cl- + I 2
Combustion n Reaction of a hydrocarbon/alcohol or other organic molecule with oxygen gas to produce carbon dioxide and water C 3 H 8 + 5 O 2 → 3 CO 2 + 4 H 2 O CH 3 CH 2 OH + 3 O 2 → 2 CO 2 + 3 H 2 O
Decomposition/Composition n Decomposition has only one reactant and it breaks up into elements and /or compounds Mg. CO 3 Mg. O + CO 2 Ba(OH)2 Ba. O + H 2 O 2 Al 2 O 3 4 Al + 3 O 2
Decomposition / Composition n Composition has two reactants that combine into one product S 8 + 8 O 2 8 SO 2 nonmetal oxides plus water makes acids SO 3 + H 2 O 2 H+ + SO 42 metal oxides plus water makes bases Ca. O + H 2 O Ca(OH)2
Complex Ions n Particles that generally combine with excess ligand (often water, hydroxide or ammonia) to form complex ions with a charge Cu 2+ + 4 NH 3 [Cu(NH 3)4]2+ Al 3+ + 4 OH- [Al(OH)4]Ag. Cl + 2 NH 3 [Ag(NH 3)2]+ + Cl. Fe 3+ + SCN- [Fe(SCN)]2+ having the correct ligand number is not required but being consistent with number and charge is important
In Review n n n Identify type of reaction from list of 5 types Equations need to be balanced Check for appropriate charges Remember not to include spectator ions Remember practice questions about each of the 3 balanced net ionic equations
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