Quick Questions, Short Answers - No Debate

Could you have teapots that acted like orange trees? I'm pretty sure that L points and black holes are two different things.

Actually the contrast is relatively low because they have roughly the same luminance. It's hard to read because only a subset of the cells in your retina can perceive the difference.Flip your color space over to grayscale and you'll see that they're not so different at all.

Dissociation happens because it's free-energy favorable, so the extent to which it happens is determined by the free energy (delta-G). Recall that delta-G = RT ln(K). Take the derivative of K in terms of T and you'll see how the dissociation constant of HCO₃ is affected by an increase in ocean temperatures.

Well, that's not going to be hard to figure out at a back-of-the-envelope level. A 50% change in solubility across a 20 degree difference is huge. Over the same temperature, though, the free energy will only change by about 6%. So the solubility is clearly your first-order factor.