In: Chemistry
1.) Use a table of Standard Reduction Potentials to predict if a
reaction will occur when Mg metal is put into a 1M
aqueous H+solution.
If a reaction will occur, write a balanced net ionic equation for
the reaction. If no reaction will occur, leave all boxes blank.
2.) Use a table of Standard Reduction Potentials to predict if a
reaction will occur between Zn metal and
I2(s), when the two
are brought in contact via standard half-cells in a voltaic
cell.
If a reaction will occur, write a balanced net ionic equation for
the reaction, assuming that the product ions are in aqueous
solution. If no reaction will occur, leave all boxes blank.
1)
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standard reduction potential of Mg is more than H so following reaction occurs: Mg > Mg +2 + 2 e^ - 2 H+ + 2 e^ - > H2 (aq) overall Mg + 2 H+ > Mg +2 (aq) So Mg dissolves in Acids(H+ ions ) that is it gives two electrons ..where as H+ ions accept electrons 2) standard electrode potential of Zn is more that I so following reaction occurs Zn > Zn+2 + 2 e^- 2 I - < 2 e - + I 2 (aq) ------------------------------- Overall : Zn + I2 > Zn+2 + 2I^ - (aq) (aq) |