Write a balanced overall reaction from these unbalanced half-reactions.

Asked by maham237 @ 18/12/2020 in Chemistry viewed by 276 People

Sn->Sn2+ Ag+->Ag Balanced overall equation I got Sn+2Ag+->Sn+2Ag, but its wrong.

Answered by maham237 @ 18/12/2020

The first half reaction is:
Sn+ -> Sn2+

You add 1 electron on the right side:
Sn+ -> Sn2+ + 1e-

The second half reacation is:
Ag+ -> Ag

You add 1 electron to the left side:
Ag+ + 1e- -> Ag

Then, you combine both reactions to get the balanced overall reaction since both half reactions have 1 electrons on the right and left side, respectively. You get:
Sn+ + Ag+ -> Sn2+ + Ag

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