CO2 is used to deacifiy olive oil, wine, water, etc. So how is it leading to increasingly acidified oceans?
They are implying doom when the actual increase in CO2 in the ocean is about 4 parts per thousand. There is 50 times as much in the ocean as the air. 1/3 of human produced CO2 went into the ocean of the 1/3 we increased the concentration in the air. You make a devastating argument with the fact the CO2 isn't constant in concentration. They are forced to just put their heads in the sand and ignore reality. It is convenient for their propaganda and they distort it in any way possible to make it sound dire. It is just an observed change of 0.075 pH units. The change in ions happens when there is a change in temperature. There has been an increase in volcanoes because of the the loss of the of the geostatic pressure after the ice age. There is also the possibility that it is create by life. Life changes pH during many of biochemical processes. Considering that CO2 is removed in the ocean as part of the carbon cycle, I doubt that CO2 will have a significant effect.
When CO2 is dissolved in water, it forms and aqueous solution of carbonic acid. CO2 + H2O ? H2CO3 Carbonic acid is a weak acid but it still slightly lowers the pH of the ocean water. This dissolves coral that is made of calcium carbonate (a base with high pH)
THE oceans have remained alkaline during the Phanerozoic (last 540 million years) except for a very brief and poorly understood time 55 million years ago. Rainwater (pH 5.6) reacts with the most common minerals on Earth (feldspars) to produce clays, this is an acid consuming reaction, alkali and alkaline earths are leached into the oceans (which is why we have saline oceans), silica is redeposited as cements in sediments, the reaction consumes acid and is accelerated by temperature (see below). In the oceans, there is a buffering reaction between the sea floor basalts and sea water (see below). Sea water has a local and regional variation in pH (pH 7.8 to 8.3). It should be noted that pH is a log scale and that if we are to create acid oceans, then there is not enough CO2 in fossil fuels to create oceanic acidity because most of the planet’s CO2 is locked up in rocks. When we run out of rocks on Earth or plate tectonics ceases, then we will have acid oceans.
