[masonq3030]

This problem is confusing me.
I have sample data from which I calculated molarities for each analyte.
Na=8.97E4 ug/ml which is 3.90 Mol/L
NO3=1.13E5 ug/ml which is 1.82 Mol/L
OH=7.93E3 ug/ml which is 0.466 Mol/L
Chloride=1.66E3 ug/ml which is 4.68E-2 Mol/L
along with tons of other analytes and their sample data and concentrations.
Now I'm given the problem of conducting a mass balance where I'm told that the sodium exists as 70% Na+, 15% NaHSiO3, 8% NaNO3 and 7% NaNO2.
Nitrate exists as 77% NO3- and 23% NaNO3
Hydroxide is 99% OH- and 1% Al(OH)4-
Chloride is 99% Cl- and 1% KCl
along with hoards of other compounds for all the analytes in solution
I'm told that I must take the original sample data, and somehow assign a portion of the data to each chemical species that it exists as, and then sum them all up to see if the sum of all the analytes is equal to the measured density, which is 1.21 g/ml.
I'm having trouble doing this