Week 15 - National Science Foundation Grant Survey Would...

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UA GenChem National Science Foundation Grant Survey Would everyone please go to D2L SURVEY and complete the short Satisfaction survey that is open It will help us get more resources For Chemistry classes in the future It will make me happier when Grading comes along.
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UA GenChem General Chemistry General Chemistry CHEM 151 CHEM 151 Week 15
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UA GenChem Chemical Reactions Chemical reactions always start when a  center of positive charge in one  reactant ( molecule or ion ) is attracted  to a center of negative charge in  another. C 2 O 4 2- Ca 2+ Ca 2+ (aq) +  C 2 O 4 2- (aq)    CaC 2 O (s) Precipitation  Reaction Acid-Base Reaction      H 2 O (l) +  HCl (aq)    H 3 O + (aq) +  Cl - (aq )
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UA GenChem Chemical Reactions The reactions we have talked about so far –  acid-base reactions & precipitation reactions Both take place in aqueous solutions and the charges of the ions  DO NOT  CHANGE  – they simply swap partners. Let’s investigate another type of reaction  where this is not the case…
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UA GenChem REDOX  Reactions   Let’s look at chemical reactions with full electron transfers: Cu wire Ag +  ions Cu 2+  ions  + Ag metal Cu   +   2   AgNO 3                Cu(NO 3 ) 2      +   2   Ag
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UA GenChem Oxidation-Reduction Reactions Oxidation-Reduction Reactions 2  Fe (s )  + 3  O 2 (g )   2  Fe 2 O 3 (s )      REDO X  C o m pa re  to :                                 Fe C l 2  +  Na 2 S      Fe S (s )  + 2 Na C l     Wha t is  diffe re nt? O the r e xa m ple s  o f REDO X:   CH 4 (g)  + 2  O 2 (g)   CO 2 (g)  + 2  H 2 O(l)   3  H 2 (g)  +  N 2 (g)   2  NH 3 (g)    Fe 2 O 3 (s)  + 2  Al(s)   2  Fe(s)  +  Al 2 O 3 (s) Wha t do  the y ha ve  in  c o m m o n?
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This note was uploaded on 02/05/2011 for the course CHEM 151 taught by Professor Staff during the Fall '08 term at Arizona.

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Week 15 - National Science Foundation Grant Survey Would...

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