REDOX Chemistry Challenge Contest

193rd 2YC3 Meeting

Fall 2011

Round Ultimate @ Hampton Inn after 9 pm Saturday

Your Homework !

 

Team Members: ______________________ & ____________________________

Expert/Guest (optional): ___________________________

College/School: __________________________________

Division: Advanced: (CHM 2046 & Higher/Chemistry Majors/Chemistry Faculty)

Division: Intermediate: (CHM 2045/Science-Engineering Majors)

Division: Beginners: (CHM 1020, CHM 1025, CHM 1032[Allied Heath Majors])

 

Equation The Ultimate: Acid Media-Total Molecular Form:

 

The Ultimate Equation:

 

 

H2 + Ca(CN)2 + NaAlF4 + FeSO4 + MgSiO3 + KI + H3PO4 + PbCrO4 + BrCl +

 

CF2Cl2 + SO2

--->

PbBr2 + CrCl3 + MgCO3 + KAl(OH)4 + Fe(SCN)3 + PI3 + NaSiO3 + CaF2

 

+ H2O

 

 

Half Equation Method: Hint!

 

Half Equation: (Start With:)

 

 

Ca(CN)2 ---> Fe(SCN)3

 

 

 

 

 

Half Equation

 

 

--->

 

 

 

 

 

 

 

Your Final Answer:

 

H2 + Ca(CN)2 + NaAlF4 + FeSO4 + MgSiO3 + KI + H3PO4

 

+ PbCrO4 + BrCl + CF2Cl2 + SO2

--->

PbBr2 + CrCl3 + MgCO3 + KAl(OH)4 + Fe(SCN)3 +

 

PI3 + NaSiO3 + CaF2+ H2O

 

 

 

Read JCE article about alternate methods to solve The Ultimate!

 

Mathematical Linear Equations Method (The Ulimate):
Balancing REDOX without Puzzling (Hoor 1997)

 

Half Equation Method Answer:

 

119 H2 + 18 Ca(CN)2 + 6 NaAlF4 + 12 FeSO4 + 6 MgSiO3 + 6 KI + 2 H3PO4 +

 

12 PbCrO4 + 24 BrCl + 6 CF2Cl2 + 24 SO2

 

--->

12 PbBr2 + 12 CrCl3 + 6 MgCO3 + 6 KAl(OH)4 + 12 Fe(SCN)3 + 2 PI3 +

 

6 NaSiO3 + 18 CaF2 + 110 H2O

 

Alternate Answer (via Matrix Algebra see article:

(Hoor 1997 ACS Journal of Chemical Education):

 

88 H2 + 15 Ca(CN)2 + 6 NaAlF4 + 10 FeSO4 + 3 MgSiO3 + 6 KI + 2 H3PO4

+ 6 PbCrO4 + 12 BrCl + 3 CF2Cl2 + 20 SO2

--->

6 PbBr2 + 6 CrCl3 + 3 MgCO3 + 6 KAl(OH)4 + 10 Fe(SCN)3 + 2 PI3

+ 3 Na2SiO3 + 15 CaF2 + 79 H2O