AP EAMCET · Chemistry · Electrochemistry
The emf of the following cell \(\mathrm{Mg}\left|\mathrm{Mg}^{+2}(0.01 \mathrm{M})\right|\left|\mathrm{Sn}^{+2}(0.1 \mathrm{M})\right| \mathrm{Sn}\) at \(298 \mathrm{~K}\) in ' \(\mathrm{V}\) ' is \(\left(\right.\) Given, \(\left.E_{\mathrm{Mg}^{+2} \mid \mathrm{Mg}}^{\circ}=-2.34 \mathrm{~V}, E_{\mathrm{Sn}^{+2} \mid \mathrm{Sn}}^{\circ}=-0.14 \mathrm{~V}\right)\)
- A 2.17
- B 2.23
- C 2.51
- D 2.45
Answer & Solution
Correct Answer
(B) 2.23
Step-by-step Solution
Detailed explanation
At anode, \(\quad \mathrm{Mg} \longrightarrow \mathrm{Mg}^{2+}+2 e^{-}\) At cathode, \(\mathrm{Sn}^{2+}+2 e^{-} \longrightarrow \mathrm{Sn}\) From Nernst equation,…
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