The new Ray-X sponge, treated with barium sulphate, eliminates guess work.

From the weight of barium sulphate, calculate the percentage of sulphur (S) in the sample.

The dissolved barium sulphate, like any electrolyte, is dissociated, and the equilibrium conditions may be expressed thus:

It was just the color of barium sulphate, and had a little lace bunched at the throat.

In determining it, it is first converted into sulphuric acid, and then precipitated and weighed as barium sulphate.