The figure shows the chromatogram. Determine which statement about the chromatogram is true. (Chromatogram adapted from The General Elution Problem in Chromatography by David Harvey)

This method is based on the difference in molecular weights of individual analytes. The individual fractions are separated using a porous hydrated gel. Smaller molecules can penetrate even into the smallest pores of the gel and are thus retained longer. Large particles do not fit into small pores, so they are retained only a little, and pass through the system quickly.

Equilibrium voltage is given by the difference of two potentials and by the concentration of substances.

A standard hydrogen electrode is used to determine the redox potential of the half-cell.

Titration is a volumetric analysis aimed at determining the concentration of the titrant solution contained in the burette.