Respuesta :

znk

The eluent moves along the chromatography paper because of capillary action.

The molecules of eluent have strong attractions (adhesive forces) to those of the paper.

The molecules of eluent also have strong attractions (cohesive forces) to each other.

Thus, as the adhesive forces pull eluent molecules in contact with the paper along its surface, cohesive forces pull the rest of the molecules along with them.

pstnonsonjoku

The forces that eluting solution to move along the chromatography paper are;

  • Capillary action
  • Adhesive forces
  • Cohesive forces

Cohesive forces are the forces of attraction between the solvent molecules. The adhesive forces are the forces of attraction that exists between the solvent and the paper. Capillary action is the force that pulls the eluting solution along the paper.

Hence, an interplay of adhesive forces and capillary action makes the eluting solution to move along the chromatography paper.

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