PolarBear, do you deny the following statement:
Between 1751 and 1994 surface ocean pH is estimated to have decreased from approximately 8.25 to 8.14 [5], representing an increase of almost 30% in H+ ion concentration in the world's oceans.[6][7]
5) Jacobson, M. Z. (2005). "Studying ocean acidification with conservative, stable numerical schemes for nonequilibrium air-ocean exchange and ocean equilibrium chemistry". Journal of Geophysical Research Atmospheres 110: D07302. Bibcode:2005JGRD..11007302J. doi:10.1029/2004JD005220.
6) Hall-Spencer, J. M.; Rodolfo-Metalpa, R.; Martin, S.; et al. (July 2008). "Volcanic carbon dioxide vents show ecosystem effects of ocean acidification". Nature 454 (7200): 969. Bibcode:2008Natur.454...96H. doi:10.1038/nature07051. PMID 18536730.
7) Report of the Ocean Acidification and Oxygen Working Group, International Council for Science's Scientific Committee on Ocean Research (SCOR) Biological Observatories Workshop
It's an
ESTIMATE From people who have been caught with their thumb on the scale multiple times
That`s right it`s an estimate and the people who estimated it are hell bent to "prove" that oceans "acidify at alarming" or "unprecedented" rates....and do it by claiming that they estimate that the "average ocean pH" which varies all over the place was 0.1 pH units higher.
The fact that there is no data supporting that claim does not matter because in that "science" all it takes is an estimate and a "consensus" amongst those who estimated it. After that some of the media and individuals with no background in chemistry whatsoever do the rest.
Take "mamooth" for example.
Now he is
twisting it as if I was the one who picked these numbers from wiki....which are indeed for water without any CaCO3 buffer in it.
Now he admits it has nothing to do with sea water and
talks as if it wasn`t him who copied and pasted the numbers from that wiki-page.
All I did was showing how way off the mark his claim was.
So "mamooth" show me were in your post you addressed the partial pressure for CO2.
After you posted these ridiculous numbers I posted what it would take for pCO2 for the equally ridiculous pH range you copied from wikipedia:
polarbear post 352
So he used pH 7 as a baseline and picked the numbers of the wiki table for pH 6.81 without understanding what the table shows.
On the left side of the table are the numbers for the partial pressure of CO2 you need to get from pH 7 down to pH 6.81
For pH7 pCO2 = 10^(-8) atm and to get it down to pH 6.81 you need a pCO2 of 10^(-6) in other words 100 times more CO2 than what it is
if the oceans were already at pH 7
And now
you pretend that I picked that table and that you did it correctly for ppm CO2.
But that`s par for the course. Everyone of you instant wiki-science "graduates" does the same thing when you get caught bullshitting.
If you had any idea whatsoever how to do the math then why did you not do it for the pH range of 8.25 to 8.14 ?
If I wanted to I could and I would not be confined to the numbers of that wiki-page
which don`t go above pH7.
You however are confined to the numbers wiki listed there
because you haven`t got the slightest clue how to do that calculation.
and boast to Frank that you know more about chemistry than he does...and are you saying now you know more about it than I do as well?
Weren`t you the one who was talking about "ink molecules" last year when the same subject was discussed.
I`m still waiting for you to show me what the molecular structure of an "ink molecule" looks like.
We have been round the same bend just a little while ago with that instant wiki-science expert"Abraham3" before he changed his name to "Crick".
He can`t even use a log function correctly and you can`t do a simple calculation with exponents either:
mamooth post # 349
According to the wiki page on carbonic acid, a pH of 6.81 requires a CO2 concentration of 3.36E-8 moles/liter.
CO2 is about 44 grams per mole, so multiplying, we get 1.5E-6 grams/liter.
1000 grams in a liter, so CO2 concentration is ... 1.5E-7 percent.
44 times 3.36 ^(-8) = 0.00000014784 grams or ~ 1.5 E-7 grams per liter not 1.5 E-6
and if you have 0.00000014784 grams per liter that would be 0.00014784 ppm. A ppm is one part per million and a percent is one part in 100.
So before you start lecturing us about pH and chemistry you should first learn how to use exponents and how to convert ppm correctly to percent.
And after you did then come back here and tell us what the pH would be if you got a solution of 1.5 ^(-7) grams of CO2 gas in water.
1.7/1000 th of that is Carbonic acid and the pKa for Carbonic acid is on the same wiki page you were quoting.
Since you were the one who used tables for plane water keep using plain water.
You have no idea anyway what you were quoting from there when you did your milkmaid math and could not even do that right.
If you knew how the pH is calculated then you should have realized at the first glance at that table that the numbers you used to perform your screwy math
has nothing to do with dissociated CO2 as an acid.
The number you copied from the table [CO2](mol/L) was
3.36E-8 moles/liter
Since you have zero knowledge about chemistry you don`t know the difference between [CO2] and [CO
3]
2- and took that number as dissociated [CO
3]2- which is the anion of carbonic acid.
The correct numbers for the pH you picked (pH 6.81) would have been in then columns labelled [HCO3−](mol/L) and [CO32−](mol/L)
In conclusion it`s abundantly clear that the table you wagged in front of Frank`s face has dick all to do with "ocean" water "acidification, current ppm atmospheric CO2 and the pH range in question.
And it`s also clear that you have no idea whatsoever what the number you picked expressed....which is CO2 dissolved in H2O and is in no way an "acid",...until it is Carbonic acid which only yields :
HCO3−
CO32− + H+
Ka2 = 4.69×10^(−11)mol/litre which is the ratio of [H+] times [CO3 2−] to non dissociated, meaning pH inactive carbonic acid.The [H+] concentration in moles per liter would be the square root of that and the pH would be the negative log value taken from that.
After that do the math how much more CO2 you need in the atmosphere to drop the pH from 8.1 to 8.0 considering the partial pressure increase it takes just to increase how much CO2 is dissolved in water and that it takes 1000 times more dissolved CO2 before you get 1 single molecule of carbonic acid which in turn is one of the weakest acids with a pKa of only 4.7 E-7
I won`t do it for you but rather sit back and wait for you and "Crick" to do it so that I can have a good laugh.
It would be a fulltime job to debunk all the bullshit you freaks are posting and I do have better things to do with my time.