emarcuci

I am having an issue with an evaporation model. I ran a React script which reacted rock (oxide composition) with sulfuric acid (as water and SO4 components). This runs fine to completion. I then used the 'Run'->'Pick up'->'System'->'Fluid' to pick up the final fluid composition. When trying to run this as an evaporation, I get a message that the initial solution is too supersaturated. I tried adjusting delxi and epsilon, but couldn't solve the problem. The database is proprietary, so could I please email someone the script? thanks, Emma

Morning, Thanks Tom! Entering as a concentration/activity solved the problem. Emma

Hi, I was recently using React to speciate a fluid from an experimental analysis. Basically, I ran an experiment at elevated temperature, but pH and cation/anion fluid analysis were measured at room temperature. I use React to rebalance the fluid at the higher temperature; however, several of my experiments have negative pH (~-0.15). React did not seem to like that. When I tried to run the model, it would say that H+ activity was negative and not give any output. I am working with 1 M H2SO4, so the pH should be that low. Can React (and the other modules) not handle negative pH? thank you, Emma