(Solved): 1. Calculate E and E0 for the following cell at 25C, assuming ideal solutions and no transfer of ...

1. Calculate $\mathrm{E}$ and ${\mathrm{E}}^0$ for the following cell at $25^{?}\mathrm{C}$, assuming ideal solutions and no transfer of ${\mathrm{SO}}_4{}^{2?}$ occurs. $\mathrm{Zn}?{\mathrm{ZnSO}}_4\left(10^{?5}\mathrm{M}\right)??{\mathrm{ZnSO}}_4\left(10^{?4}\mathrm{M}\right)?\mathrm{Zn}$ 2. ${\mathrm{E}}^0$ for the reaction between cytochromes ${\mathrm{Fe}}^{3+}($ cyt c $)+{\mathrm{Fe}}^{2+}$ (cyt b) $?{\mathrm{Fe}}^{2+}$ (cyt c) $+{\mathrm{Fe}}^{3+}$ (cyt b) is found to be 220 milivolts at $25^{?}\mathrm{C}$. Calculate $\mathrm{K}$ and $?{\mathrm{G}}^{?}$ for the reaction. $?G???G^{?}=?nF?=RT\ln K$ 3. What happens to the energy of NADH oxidation that is not used to do chemieal work? The remuining energy is releukeulas 4. A membrane permeable only to ${\mathrm{K}}^{+}$ions separates $\mathrm{KCl}$ solutions of $10^{?5}\mathrm{M}$ (left) and $10^{?4}\mathrm{M}$ (right). Calculate the transmembrane potential at equilibrium. 5. ${\mathrm{E}}^{?}$ (biological standard state, $\mathrm{pH}=7$ ) for the electrode reaction ${\mathrm{CH}}_3\mathrm{CHO}+2{\mathrm{H}}^{+}+2{\mathrm{e}}^{?}?{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{OH}$ is ${\mathrm{E}}^{?}=?0.197$ volts. Calculate $\mathrm{E}$ at $\mathrm{pH}6$ when ethanoland acetaldehyde are present at $10^{?5}\mathrm{M},\mathrm{T}=25^{?}\mathrm{C}$.