which reagent gets oxidized in each of the following redox reactions.

Chemistry
Tutor: None Selected Time limit: 1 Day

Al + Cr2O3 " src="http://educog.com/res/sfu/batchelo/Gallery/rarrow.gif" align="middle"> 2Cr + Al2O3 

Ca + CuCl2 " src="http://educog.com/res/sfu/batchelo/Gallery/rarrow.gif" align="middle"> CaCl2 + Cu 

 3Si + 2Cr2O3 " src="http://educog.com/res/sfu/batchelo/Gallery/rarrow.gif" align="middle"> 4Cr + 3SiO2 

3H2 + N2 " src="http://educog.com/res/sfu/batchelo/Gallery/rarrow.gif" align="middle"> 2NH3 
May 13th, 2015

(Si or Cr2O3) -- 3Si + 2Cr2O3 --> 4Cr + 3SiO2 
Si oxidizes because Si(0) jumps to Si(+2) in SiO2 

(N2 or H2) -- N2 + 3H2 --> 2NH3 
H2 gets reduced because H2(0) jumps down to H(-1) in ammonia 

CuCl2 or Zn) --CuCl2 + Zn --> ZnCl2 + Cu 
CuCl2 gets reduced because Cu(2+) jumps down to Cu(0) in Cu 

2Al + Cr2O3 = Al2O3 + 2Cr 


May 13th, 2015

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May 13th, 2015
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