Surface Chemistry

\(\mathrm{FeCl}_{3}\) reacts with the constituents of blood which is a positively charged sol.

Blood absorbs \(\mathrm{FeCl}_{3}\) and forms a complex.

\(\mathrm{Cl}^{-}\) ions cause coagulation of blood.

\(\mathrm{Fe}^{3+}\) ions coagulate blood which is a negatively charged sol.