Ferric chloride is applied to stop bleeding because-
- Fe3+ ions coagulate blood which is a negatively charged sol.
- FeCl3 reacts with the constituents of blood which is a positively charged sol.
- Blood absorbs FeCl3 and forms a complex.
- Cl– ions cause coagulation of blood.
The Correct Option is A
Solution and Explanation
Step 1: Understanding the coagulation process
Blood exists as a negatively charged sol. When ferric chloride (FeCl$_3$) is introduced, the Fe$^{3+}$ ions interact with the negatively charged blood sol, causing it to coagulate. This occurs due to the electrostatic attraction between the positively charged Fe$^{3+}$ ions and the negatively charged blood particles.
Step 2: The role of \(Fe^{3+} ions\)
The Fe$^{3+}$ ions neutralize the negative charge on the blood particles, leading to their aggregation and coagulation. This explains why Fe$^{3+}$ ions are responsible for facilitating the coagulation of blood.
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