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Langelier Index Calculator

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To use the Langelier Index calculator, simply enter values for pH, Temperature (in °C), TDS (mg/L), Ca, and Alkalinity (as CaCO3) in the boxes below and then click on the “Calculate Now” button. SIcalcite corresponds to the traditional Langelier Index value.

Temperature (°C):

pH:

TDS (mg/L):

Ca (mg/L):

as

Ca2+

as CaCO3
Alkalinity (mg/L as CaCO3):

Results

SIcalcite:

SIaragonite:

SIvaterite:

SIavg:

Ionic Strength:

Activity Coef

eps:

pfm:

pHCO3:

pK2:

pKs:

pKsa:

pKsv:

pKsavg:

pCa:

pHs:

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