If a strip of magnesium metal is dipped into a solution containing silver ions, does a spontaneous reaction occur? If so, write the two half-reactions and the balanced overall equation for the reaction.
Magnesium metal is dipped into a solution containing silver ions, spontaneous reaction occurs. According to the classification , magnesium is a member of the third class and silver is a member of the first, so magnesium should be more readily oxidized than silver. The magnesium should be oxidized to Mg2+ (aq) and Ag + (aq) should be reduced to silver metal when magnesium added to silver nitrate solution.
As the ions are of different charge,conservation of charge can be achieved only by making two silver ions react with each magnesium atom.
The two half reactions are,
Mg2+ + 2 e- Mg