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1.) Use a table of Standard Reduction Potentials to predict if a reaction will occur when...

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Chemistry

1.) Use a table of Standard Reduction Potentials to predict if areaction will occur when Mg metal is put into a 1Maqueous H+solution.

If a reaction will occur, write a balanced net ionic equation forthe reaction. If no reaction will occur, leave all boxes blank.

2.) Use a table of Standard Reduction Potentials to predict if areaction will occur between Zn metal andI2(s), when the twoare brought in contact via standard half-cells in a voltaiccell.

If a reaction will occur, write a balanced net ionic equation forthe reaction, assuming that the product ions are in aqueoussolution. If no reaction will occur, leave all boxes blank.

Answer & Explanation Solved by verified expert
3.5 Ratings (312 Votes)

1)  

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)
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