unit 7: predicting products
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Unit 7: Predicting Products. Chapter 11.1 Pages 330-339. Predicting Products. Synthesis A + B AB Practice Sodium metal reacts with chlorine gas Na (s) + Cl 2(g) Solid Magnesium reacts with fluorine gas Mg (s) + F 2(g) - PowerPoint PPT PresentationTRANSCRIPT
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Chapter 11.1Pages 330-339
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SynthesisA + B ABPractice
•Sodium metal reacts with chlorine gas Na(s) + Cl2(g)
•Solid Magnesium reacts with fluorine gas
Mg(s) + F2(g) •Aluminum metal reacts with fluorine gas
Al(s) + F2(g)
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DecompositionAB A + BPractice
•Solid Lead (IV) oxide decomposes PbO2(s)
•Aluminum nitride decomposes AlN(s)
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Single ReplacementAB + C AC + BMust use activity series to determine if a reaction will take place (page 333)
Practice• Sodium chloride solid reacts with fluorine
gas NaCl(s) + F2(g)
• Aluminum metal reacts with aqueous copper (II) nitrate
Al(s)+ Cu(NO3)2(aq)
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Double ReplacementAB + CD AD + CBPractice
Calcium chloride reacts with sodium phosphate
CaCl2(aq) + Na3PO4(aq) Lead (II) nitrate reacts with barium
chloride Pb(NO3)2(aq) + BaCl2(aq)
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Acid/Base (a special type of double replacement reaction)HA + B(OH) H2O + BAPractice
Hydrochloric acid reacts with sodium hydroxide
HCl(aq) + NaOH(aq) Sulfuric acid reacts with copper (II)
hydroxide H2SO4(aq) + Cu(OH)2(aq)
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CombustionAlways produces carbon dioxide and water
PracticePentane reacts with oxygen
C5H12 + O2 Decane reacts with oxygen
C10H22 + O2
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A complete ionic equation shows dissolved ionic compounds as dissociated free ions.
Example:
Ag+ (aq) + NO3-
(aq) + Na+ (aq) + Cl-
(aq) AgCl (s) + Na+
(aq) + NO3- (aq)
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Spectator ions – those ions not directly involved in the chemical reaction.
Ag+ (aq) + NO3-
(aq) + Na+ (aq) + Cl-
(aq) AgCl (s) + Na+
(aq) + NO3- (aq)
Net ionic equation – equation for reaction in solution that shows only those particles that are directly involved the chemical change.
Ag+ (aq) + Cl-
(aq) AgCl (s)
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You can predict which compounds are the spectator ions by using the following solubility rules:
Compounds Solubility
Salts of alkali metals and ammonia
Soluble (aq)
Nitrate salts (NO3) and chlorate salts (ClO3)
Soluble (aq)
Sulfate (SO4) salts except compounds with Pb 2+, Ag +, Hg2 2+, Ba 2+, Sr 2+, and Ca 2+
Soluble (aq)
Chloride (Cl) salts except compounds with Ag +, Pb 2+, and Hg2 2+
Soluble (aq)
Carbonates, Phosphates, Chromates, Sulfides, and hydroxides
Insoluble (s)
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Pb(NO3) 2 (aq) + H2SO4 (aq) PbSO4 (s) + HNO3 (aq)
Pb 2+ + (NO3) - + H2+ + SO4 PbSO4 + H+ + NO3-
H+ + NO3- spectator ions because nitrate salts are soluble and will not form precipitates.
PbSO4 is not a spectator ion because the sulfate is combined with lead, one of the noted exceptions.
Net ionic reactionPb 2+ + SO4 PbSO4