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emma_k

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Everything posted by emma_k

  1. Hi Jia, Thank you so much for your former response. I've revisited the project and had a few additional questions if you or anyone else could assist. I unfortunately do not have a file for the above image, however we are not even sure if it is accurate for the situation we're attempting to model, so I'm basically starting from scratch. The scenario is wanting to titrate in 0.18 M of NaSO4 into a solution of 5 mM Cu(2+) and 1 mM NaNO3 at pH5 to determine the concentration of free copper and copper complexes. I'm going to include screenshots of what my React setup is. I've looked through the manuals but am still struggling with error messages. I was first receiving an error regarding sulfate needing to be in the basis, however it is not in my initial solution so I set this as 0. I am also confused on what my charge balance ion would be. Thanks so much for any help on this issue! Emma
  2. Hello everyone. I'm new to GWB and am attempting to recreate a diagram that was made in my lab years ago. Essentially, I am looking to develop a plot (see attached) of the speciation of Cu(II) as a function of sulfate concentration. I know that this plot was made in Excel but the data derived from GWB. Once I figure this out I'm also hoping to do the same thing with Zn(II). It seems like it shouldn't be too difficult, but I'm struggling to find guiding resources as most plots are speciation varied by pH. If someone could explain what program in GWB they would use and how to input that data and avoid charge errors, it would be extremely helpful. Thanks for your time!
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