The process of dialysis finds application in the purification of blood by artifical kidney.In this impure blood is introduced in the artificial kidney, apparatus, where the waste material (electrolyte) diffuses through the membrane. The membrane used in the dialyser is different from the membrane used in osmosis. these membrane allow the movement of ions through them.
Blood is a negatively charged sol. The haemogolobin particles carry a positive charge. Blood is slightly alkaline (pH 7.36-7.42). Acidic salts like alum and `FeCI_3` decrease the `pH` of the blood and the denaturation of globular proteins present in blood takes place. Due to denaturation, these globular proteins become fibrous which are insoluble and stop bleeding . Blood is lyophobic in nature.
To stop bleeding , `FeCI_3` is applied locally because :
A. `FeCI_3` seals the blood vessels
B. `FeCI_3` changes the direction of blood flow
C. `FeCI_3` reacts with blood to form a solid substance which seals the blood vessel
D. `FeCI_3` causes denaturation of proteins present in blood
