One of your links suggested this has never occurred before. It has during the PETM(Paleocene-Eocene Thermal Maximum) or about 55 million years ago. A 2005 study suggest that at least 4,000 billion tons of carbon would be needed for this to occur…or all the fossil fuel reserves burnt over the next three centuries.

ed: the second part of his statement is referring to Henry’s Law. But then your going to assume the concentrate is purely CO2…?

http://www.factmonster.com/ce6/sci/A0833619.html
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just enough chemistry to understand the basics.

Whether or not you believe AGW, there’s no question that humans are increasing atmospheric CO2.
http://www.realclimate.org/index.php?p=87

And there’s no question that this is causing the ocean to acidify, and there’s no question that this acidification is killing coral reefs which are the habitat of millions of aquatic species.
http://www.usgs.gov/newsroom/article.asp?ID=1847

So regardless of your beliefs with regards to AGW, this is one of many other reasons why we need to reduce our fossil fuel consumption. There’s also the fact that fossil fuels are a limited resource, that they’re concentrated mainly in unfriendly political regions, that burning them emits other harmful byproducts besides CO2, etc. etc.
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There is nothing that can be done to compensate for ocean acidification due to increasing atmospheric CO2 aside from lowering atmospheric CO2 concentrations. On the plus side, given a few thousand years or so enough carbonate rock will weather to bring ocean pH back to around 8.3 (which is the endpoint of titrating calcium/magnesium carbonate with carbonic acid).

References :
Chapter 3, Stumm and Morgan, Aquatic Chemistry, 2nd Ed., Wiley

2. Many tons of crushed limestone (grind up the coral reefs)
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This CO2 must be volcanic in origin and is extremely local. To assume or intentionally suggest (the author not you) that it is from the human CO2 is either ignorant or despicable (or both). There is a lake in Africa that has volcanic CO2 stored up until it sometimes fizzes up and sometimes kills many people. CO2 is much more soluable in cold deep water. If water that was saturated with CO2 flowed into warmer shallower waters, it might release CO2 as well.

The ocean has many times the pH as the atmosphere. There are buffers in the ocean governing the pH levels. The pH levels are perfectly stable but assumptions of significant increases in pH due to human emissions of CO2 are rediculous in my opinion. (edit: oops I meant to say they weren’t perfectly stable)

Note: Well now I understand. IT was as I stated, an exaggeration and despicable. Do you understand now? I doubt it. That is about as credible as going to Venus and suggesting this is where we are headed. There is no lower limit for alarmism to sink to apparently.

Note: In fact warming water precipitates CaCO3 (guess what that C is?) It is carbon. Calcite constantly precipitates in the ocean. There are beaches of chemically precipitated calcite in Bermuda for example. Here is a link that suggests there is 60 times the CO2 dissolved in the ocean than pre Industrial Atmosphere (or something to that effect) and discusses the buffering of the ocean to acidity.
http://www.soest.hawaii.edu/oceanography/faculty/zeebe_files/Publications/ZeebeWolfEnclp07.pdf

YOu will notice that you have not provided a number for how much CO2 humans have produced has increased the acidity. I understand that laymen hear the word acid and they think, Oh my, we are all going to die. In fact everything with a pH under 7 is acidic. It doesn’t sound as dire if you say less alkaline. The bottom line is that effects of acidification are grossly exaggerated. You have to learn to read between the lines in these sorts of studies. You do the math. I am not worried about it in the slightest. I think all scientist that seek to scare people for no reason except additional funding and notoriety are despicable. The link I gave throws the typical bones to global warming but I wouldn’t call their conclusions despicable.
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