1.) Use a table of Standard Reduction Potentials to predict if a reaction will o
ID: 947669 • Letter: 1
Question
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.
Explanation / Answer
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)
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)
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.