![]() Species Molality Activity Molality Activity Gamma cm³/mol PH will be adjusted to obtain desired alkalinity. ![]() Output file: C:\Users\xl5552\Documents\_NewPhreeqcExcel\database\test15perNaHCO3rv1.pqoĭatabase file: C:\Program Files (x86)\USGS\Phreeqc Interactive 3.6.2-15100\database\wateq4f.datīeginning of initial solution calculations. Input file: C:\Users\xl5552\Documents\_NewPhreeqcExcel\database\test15perNaHCO3rv1.pqi This can be expressed as 150,000 mg/kgs (or ppm) of NaHCO3 or 176,470 mg/KgwĭATABASE C:\Program Files (x86)\USGS\Phreeqc Interactive 3.6.2-15100\database\wateq4f.dat ![]() To illustrate this point i did an extreme case of 15% solution of NaHCO3 with 85% water However when i enter the same solution expressed as mg/KgS or ppm there is a totally different solution that is created. when i calculate the solutions as mg/Kgw i get the correct solution. I am using phreeqcCom from an excel spreadsheet to calculate the pH and scaling indexes.
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