samstersam Posted September 22, 2003 Share Posted September 22, 2003 I have the Lamotte alk test.. i did searches at RC and here... to no avail! My alk in CaCo3 concentration reads 120 ppm...what is it in dkh or meq/l Link to comment
samstersam Posted September 23, 2003 Author Share Posted September 23, 2003 after some intense digging around i just found it... The various units used for alkalinity are themselves cause for confusion. The clearest unit, and that used by most scientists is milliequivalents per L (meq/L). For a 1 millimolar solution of bicarbonate, the alkalinity is 1 meq/L. Since carbonate takes up two protons for each molecule of carbonate, it "counts" twice, and a 1 millimolar solution of carbonate has an alkalinity of 2 meq/L. A unit that is used by many kits and some industries involves representing alkalinity in terms of the amount of calcium carbonate that would need to be dissolved in fresh water to give the same alkalinity. Typically, it is reported as ppm calcium carbonate. Of course, it has nothing to do with calcium, and there may be no carbonate in the water at all. Nevertheless, it is frequently used. Since calcium carbonate weighs 100 grams/mole (100 mg/mmole), then a solution that has an alkalinity of 100 ppm calcium carbonate equivalent contains 100 mg/L calcium carbonate divided by 100 mg/mmole calcium carbonate = 1 mmol/L calcium carbonate equivalent. Since carbonate has 2 equivalents per mole, this 100 ppm of alkalinity is equivalent to 2 meq/L. So to convert an alkalinity expressed as ppm CaCO3 to meq/L, divide by 50. useless, all of you... USELESS!!!!! AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH Link to comment
kennerd Posted October 16, 2003 Share Posted October 16, 2003 Samster: You're busting balls about no one posting a response in 5 hours and it took you 1 minute to find the answer on your own. hint? Link to comment
Physh1 Posted October 19, 2003 Share Posted October 19, 2003 *cough*impatient*cough* It is the weekend and not everyone decides to spend it on the net. Cameron Link to comment
kennerd Posted October 19, 2003 Share Posted October 19, 2003 Originally posted by Physh1 *cough*impatient*cough* It is the weekend and not everyone decides to spend it on the net. Ahem Or spend it checking dates either. hehe Link to comment
samstersam Posted October 27, 2003 Author Share Posted October 27, 2003 godda,n thhread jackers Link to comment
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