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h2 (g).                   

2mg2++(aq)+2e-->mg (s).

Calculate e°cell.ecell

E°mg=-2.37v

 

-->

Consider a galvanic cell that uses the half reactions

2H+(aq)+2e-->h2 (g).                   

2mg2++(aq)+2e-->mg (s).

Calculate e°cell.ecell

E°mg=-2.37v

 

Asked by mugdharaut2001 16th May 2018, 4:15 PM
Answered by Expert
Answer:
The space hydrogen space atoms space are space reduced space by space half space cell space reaction colon

2 straight H to the power of plus space plus space 2 straight e to the power of minus space rightwards arrow space straight H subscript 2

Magnesium space loses space two space electrons space and space oxidised space by space half space cell space reaction colon

Mg space rightwards arrow space Mg to the power of plus space plus space 2 straight e to the power of minus

Reduction space potential colon space straight E to the power of 0 equals space 0.00 space straight V

The space reaction space has space straight E subscript 0 space equals space minus 2.372 space straight V


straight E subscript 0 subscript Oxid space equals space minus straight E subscript 0 subscript Redu


straight E subscript 0 subscript Oxid space equals space 2.37 space straight V

straight E subscript 0 subscript Cell space end subscript space equals space straight E subscript 0 subscript Oxid space plus straight E subscript 0 subscript Redu

straight E subscript 0 subscript Cell space end subscript space equals space 0 plus 2.37

straight E subscript 0 subscript Cell space end subscript space equals space 2.37 space straight V
The space hydrogen space atoms space are space reduced space by space half space cell space reaction colon

2 straight H to the power of plus space plus space 2 straight e to the power of minus space rightwards arrow space straight H subscript 2

Magnesium space loses space two space electrons space and space oxidised space by space half space cell space reaction colon

Mg space rightwards arrow space Mg to the power of plus space plus space 2 straight e to the power of minus

Reduction space potential colon space straight E to the power of 0 equals space 0.00 space straight V

The space reaction space has space straight E subscript 0 space equals space minus 2.372 space straight V


straight E subscript 0 subscript Oxid space equals space minus straight E subscript 0 subscript Redu


straight E subscript 0 subscript Oxid space equals space 2.37 space straight V

straight E subscript 0 subscript Cell space end subscript space equals space straight E subscript 0 subscript Oxid space plus straight E subscript 0 subscript Redu

straight E subscript 0 subscript Cell space end subscript space equals space 0 plus 2.37

straight E subscript 0 subscript Cell space end subscript space equals space 2.37 space straight V
Answered by Expert 18th May 2018, 1:14 PM
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