logdrum

Recipes 

OK I've got the specs on my (Cleveland, OH) water, but can't figure out which # to plug into the HCO3 slot:


Ca:33
Mg:8.8
So4:45
Na:7.7
Cl:33
Total Alkalinity:78
Hardness:122
Ph:7.4
Any ideas?

-d

ajdelange

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Not sure what you mean by "plug into the HCO3 slot" but the relationship between alkalinity and bicarbonate ion concentration for pH < 8.3 is

[HCO3-] = 61*alkalinity/50

where [HCO3-] is the concentration of bicarbonate in mg/L (ppm) and alkalinity is the alkalinity expressed in ppm as CaCO3.

logdrum

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"plug into the HCO3 slot"

for example using this calculator:

http://www.brewersfriend.com/water-chemistry/

According to your formula (since my pH is 7.4)

61*78/50=[HCO3] right?
HCO3=95.16

ajdelange

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Yes. And you'll notice that if you put 95.16 into the HCO3- window the alkalinity window changes to 78.

logdrum

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Ha! I didn't notice that until you pointed it out, once again proving that old saw "math doesn't lie"

Thanks for your help

rudu81

Recipes 

Just found this thread randomly, and am curious what answer you were able to find. I live in South Euclid and am trying to build a water profile in Beer Smith. The figures that I found (from a book) are:

Ca 33
Mg 8.0
Na 11.0
SO4 25.0
Cl 16.0
PH 7.3

Not sure what to do about alkalinity and hardness and can't find anything on HCO3. Any ideas?

Thanks!