Bulk vs Free?

[Erik S Friis]

I've read the section in one of the manuals regarding this but as a software engineer and not a chemist I'm still a bit unclear.

When setting up a basis, we take the set of input species and drill down to get an aggregated set of basis species and then prorate the specified amounts for each species across its subspecies. In this scenario is there a reason to use "free?" Can anyone explain the use of "free" in layman's terms so a software engineer can understand too? LOL

[Jia Wang]

Hello Erik,

Please find my response to your earlier post here. I had already included some explanation regarding bulk vs. free quantity there before seeing this post. 

Best regards,
Jia Wang
Aqueous Solutions LLC