# Which Mixture of the Solution Will Lead to the Formation of Negatively Charged Colloids of [AgI]I- sol?

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Updated on: September 25th, 2023

(a) 50mL of 1MAgNO3 + 50ml of 2MKI

(b) 50mL of 2MAgNO3 + 50ml of 1.5 MKI

(c) 50mL of 1MAgNO3 + 50ml of 1.5MKI

(d) 50mL of 0.1MAgNO3 + 50ml of 0.1MKI

The mixture of the solution 50mL of 1MAgNO3 + 50ml of 1.5MKI will lead to the formation of negatively charged colloids of [AgI]I sol.

Explanation for the correct option:

(c) 50mL of 1MAgNO3 + 50ml of 1.5MKI

The iodide ion I will be absorbed in the surface of the AgI particles, giving them a negative charge: “The colloidal sol AgI is created by adding KI solution to the AgNO3 solution until KI is in slightly excess.”

AgI + I→ AgI: I

The reaction that takes place when AgNO3 and KI react together can be depicted as:

AgNO3(aq)+KI(s)→AgI(aq)+KNO3(aq)

As a result, the concentration of KI must be somewhat higher than necessary in order to surround the silver iodide with iodide ion AgNO3. Thus, the concentration will be 50mL of 1MAgNO3 + 50ml of 1.5MKI

Explanation for incorrect options:

The concentration of KI must be slightly more than AgNO3. Thus, options A, B, and C stand incorrect.

### Uses of Colloids

Colloids are extensively used in commercial, home, and medicinal purposes.

1. Syrup, halwa, and soup all fall under the category of colloidal food items.
2. Medicine: Argyrols, a brand of colloidal silver, works as an antiseptic for eye infections.
3. The Cottrell precipitator air purification technology includes a process called solution particle coagulation. Pure air departs through a different outlet when dust or smoke enters an electrified chamber with a central electrical plate that has the opposite charge of a smoke particle. This causes the dust or smoke to congeal.
4. Animal skins are very soft, thus tanning involves soaking them in a solution of tannin that has the opposite charge to the animal skin. This causes the particles in the skin to coagulate, making the skin rigid.
5. Delta formation: It entails the coagulation of river clay particles with a seawater electrolyte.

Hence, the correct option is (c) 50mL of 1MAgNO3 + 50ml of 1.5MKI

Summary:-

## Which Mixture of the Solution Will Lead to the Formation of Negatively Charged Colloids of [AgI]I- sol? (a) 50mL of 1MAgNO3 + 50ml of 2MKI (b) 50mL of 2MAgNO3 + 50ml of 1.5 MKI (c) 50mL of 1MAgNO3 + 50ml of 1.5MKI (d) 50mL of 0.1MAgNO3 + 50ml of 0.1MKI

The mixture of the solution 50mL of 1MAgNO3 + 50ml of 1.5MKI will lead to the formation of negatively charged colloids of [AgI]I sol

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