	反应
1	$E = - \frac{Δ_{r} G_{T}}{4 F} - \frac{2.303 R T}{F} pH$
2	$E = - \frac{Δ_{r} G_{T}}{4 F} - \frac{3 * 2.303 R T}{2 F} - \frac{5 * 2.303 R T}{4 F} pH$
3	$pH = - \frac{Δ_{r} G_{T}}{2.303 R T} - 6$