Devise cells to study the following biochemically important reactions. In each case state the value for v to use in the Nernst equation.
(a) CH3CH2OH(aq) + NAD+(aq) ? CH3CHO(aq) + NADH(aq) + H+(aq)
(b) ATP4-(aq) + Mg2+(aq) ? MgATP2-(aq)
(c) 2 Cyt-c(red, aq) + CH3COCO2-(aq) + 2 H+(aq) ? 2 Cyt-c(ox, aq) + CH3CH(OH)CO2-(aq)