CO2 from KH and pH

• To: aquatic-plants at actwin_com
• Subject: CO2 from KH and pH
• From: gomberg at wcf_com (Dave Gomberg)
• Date: Sat, 24 Jun 95 12:15:45 EDT

I worked it out by formula so it is much easier to
remember:

for KH=1, CO2(ppm)=3*10**(7-pH)

for other KH values, just multiply by KH, so
CO2(ppm)=KH*3*10**(7-pH)
which looks remarkably like the equilibrium
equation for:

     H2O + CO2 = 2H+ + CO3--

Didn't I see this before in freshman chem about 30
years ago?
Dave Gomberg, Experimenta      San Francisco CA      gomberg at wcf_com

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