Question

Consider the given circuit carefully, What do you think would happen if the two copper plates are moved further apart from each other ?

• A. Larger amount of copper will be deposited on the plate connected to the negative electrode
• B. Smaller amount of copper will be deposited on the plate connected to the negative electrode
• C. Larger amount of copper will be deposited on the plate connected to the positive electrode
• D. Smaller amount of copper will be deposited on the plate connected to the positive electrode

Answer 1

Answer: (A)

Reduction at cathode (negative electrode) : $C{u}^{+2}+2e_0^{-1}\to Cu$

$C{u}^{+2}$ ions from the solution gets attracted by the negative electrode (cathode) which have excess electrons. These $C{u}^{+2}$ ions take the electrons from the cathode and thus gets reduced as $Cu$ atoms. As the two copper plates are moved further, more and more $C{u}^{+2}$ ions are reduced at the cathode and hence larger amount of copper deposits on the plate connected plates to the negative electrode (cathode).