Question

Is it safe to stir a 1 M AgNO₃ solution with a copper spoon? Explain.

(Given: `E_((Cu^(2+)//Cu))^°` = +0.34 V, `E_((Ag^+//Ag))^°` = +0.80 V)

Answer 1

The following reaction takes place:

\[\ce{Cu + 2Ag^+_{(aq.)} ->Cu^2+_{(aq.)} + 2Ag}\]

`E_"cell"^° = E_"cathode"^° + E_"anode"^°`

= +0.80 − (+0.34)

= +0.46

Copper spoon will dissolve in 1 M AgNO₃ solution; therefore, it is not safe to stir 1 M AgNO₃ solution with a copper spoon.