SH 453
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How does a galvanic cell differ from an electrolytic cell? Calculate the emf of the following cell at 25°C giving electrode reactions and cell reaction.
$$\mathrm{Cd(s)}\,\mathrm{Cd^{2+}}(0.01\,\mathrm{M})\parallel\mathrm{Cu^{2+}}(0.5\,\mathrm{M})\,\mathrm{Cu(s)}$$
$E^\circ_{\mathrm{Cd^{2+}/Cd}} = -0.140\,\mathrm{V}$, $E^\circ_{\mathrm{Cu^{2+}/Cu}} = 0.34\,\mathrm{V}$
What is normal hydrogen electrode? A galvanic cell consists of a metallic nickel plate immersed in 0.1M $\mathrm{Ni(NO_{3})_{2}}$ solution and a metallic plate of copper in 0.2M $\mathrm{CuSO_{4}}$ solution. Calculate the emf of this cell.
$E^\circ_{\mathrm{Ni^{2+}/Ni}} = -0.25\,\mathrm{V}$ $E^\circ_{\mathrm{Cu^{2+}/Cu}} = +0.34\,\mathrm{V}$
What is Daniel cell? How do you measure standard reduction potential of silver electrode? Calculate the emf of the following cell at standard condition, $\mathrm{Ni}\mid\mathrm{Ni^{2+}}(0.5\,\mathrm{M})\parallel\mathrm{Ag^{+}}(0.4\,\mathrm{M})\mid\mathrm{Ag}$. Given $E^\circ_{\mathrm{Ni/Ni^{2+}}} = +0.25\,\mathrm{V}$, $E^\circ_{\mathrm{Ag/Ag^{+}}} = -0.80\,\mathrm{V}$.