Question

Write a balanced overall reaction from these unbalanced half-reactions. sn⟶sn2 ag ⟶ag

Answer 1

The balanced overall reaction from these unbalanced half-reactions is given  in following steps ,

Step 1 : $Sn$ → $Sn^{+2}+ 2e^{-}$  

Step 2 : $Ag^{+}$ + $e^{-}$ →  $Ag$

 $2Ag^{+} + 2e^{-}$ → $2Ag$

Overall reaction : $Sn$ + $2Ag^{+}$ → $Sn^{+2}$ + $2Ag$

The equation in which number of atoms of elements in reactant side is equal to the number of atoms of elements in product side is called balanced chemical equation .

This step is oxidation half-reaction in which loss of electron is takes place .

Second steps is reduction reaction in which fain of electrons is takes place. We multiple second  half-reaction by two to make equal number of electrons in both steps to cancel out the electrons from the equation.

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