Question

Identify the redox reaction taking place in a beaker.

• A. $Zn_{\left(s\right) }+ Cu^{2+}_{\left(aq\right)} \to Zn^{2+}_{\left(aq\right)} + Cu_{\left(s\right)}$
• B. $Cu_{\left(s\right) }+ 2Ag^{+}_{\left(aq\right)} \to Cu^{2+}_{\left(aq\right)} + 2Ag_{\left(s\right)}$
• C. $Cu_{\left(s\right) }+ Zn^{2+}_{\left(aq\right)} \to Zn_{\left(s\right)} + Cu^{2+}_{\left(aq\right)}$
• D. $2Ag_{\left(s\right) }+ Cu^{2+}_{\left(aq\right)} \to 2Ag^{+}_{\left(aq\right)} + Cu_{\left(s\right)}$

Answer 1

Answer: (B)

Since copper is more reactive than silver, it displaces $Ag^+$ ions from its salt solution which get deposited on the copper rod.