Question

A voltaic cell is represented as:
$A\left(s\right)|A^{2+}$$\left(aq\right)||B^{2+}$$\left(aq\right)|B\left(s\right)$
Which of the following statements is false regarding the above cell ?

• A. The double vertical line indicates salt bridge
• B. A is called the anode and B is called the cathode
• C. The cell reactions are represented as $A^{2+}\left(aq\right)+2e^{-}\to A\left(s\right)$ and $B\left(s\right)\to B^{2+}\left(aq\right)+2e^{-}$
• D. None of the above

Answer 1

The correct option is C The cell reactions are represented as $A^{2+}\left(aq\right)+2e^{-}\to A\left(s\right)$ and $B\left(s\right)\to B^{2+}\left(aq\right)+2e^{-}$

For the given cell representation:

$A\left(s\right)|A^{2+}$$\left(aq\right)||B^{2+}$$\left(aq\right)|B\left(s\right)$
The vertical lines $||$ indicate the salt bridge.
A (left side) is at anode so it oxidies, and it will be represented as an oxidation half reaction, whereas B (right side) is at cathode and it reduces so it is represented by reduction half reaction
The cell reactions are represented as
$A\left(s\right)\to A^{2+}\left(aq\right)+2e^{-}$
and
$B^{2+}\left(aq\right)+2e^{-}\to B\left(s\right)$