Question

what will happen when a copper coin is placed in a solution of silver nitrate .give reason for your answer?

Answer 1

I think it will react

Answer 2

When you react solid copper coin with silver nitrate a redox reaction occurs as shown below:

Cu + 2AgNO3 --> 2Ag + Cu(NO3)2

The solid copper reacts with the silver nitrate solution (in water) to produce solid silver and copper nitrate. This is called a redox reaction. The copper gives up 2 electrons (oxidized) and transfers them to 2 silver ions to produce solid silver (reduction). The nitrate ions are merely spectator ions; they play no role in the net ionic equation. The black that immediately forms on the copper is probably copper nitrate that then eventually dissolves in the water thus giving the bluish color due to the presence of the Cu2+ ion. The silvery substance that collects on the copper wire is the solid silver forming.