Completing equilibrium table for [Ba] and [IO3]

[Glitche]

1. I have created 5 mixtures in lab and from these mixtures I am suppose to complete the equilibrium tables. I have already found most of the data via calculations such as the absorbency and the concentration of IO3- (which is the one known concentration on the equilibrium chart) I am just curious as of how to find the rest of the chart, such as the change in concentration of Ba2+ and it's equilibrium 2.(see attached pictures)
3. If you look at the pictures I have attached I found out the equilibrium of IO3 and the change in IO3, I know in order to find the other two blank boxes I must take in account that there is a 2:1 ratio between IO3 and Ba2+. I'm not sure if I should divide the change of IO3 by 2 or take the square root of it in order to find the change in Ba2+. Any help is appreciated. I have 5 mixtures to do but if I am able to find out how to do this one I can do the rest on my own.

Thank you in advance!

 

[Borek]

Sorry, not knowing what was the experimental procedure it is hard to answer. It is all about mass balance and reaction stoichiometry.