1. The problem statement, all variables and given/known data Here is my lab: http://comp.uark.edu/~rallan/Exp20.pdf [Broken] 2. Relevant equations None that I know of 3. The attempt at a solution I ran the experiment once on a known substance and once on an unknown substance. Here are my results: In the known substance, Pb Hg and Ag were all present according to the tests. In the unknown substance, only Ag was present according to the tests. I really need some help with this flow diagram (the last page that says Experiment 36). Pretty much all I really need to know is how do I know what the "solution contains"? For example, the first part that is filled out for me says "Solution contains ions in Groups II and III" but how do I know that? And how do I know what to put in the other "solution contains" blanks? Thank you so much to anyone that helps.