What is the effective concentration of emulsifying agents?

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Multiple Choice

What is the effective concentration of emulsifying agents?

Explanation:
Emulsifying agents must be present in enough quantity to cover the droplet surfaces and form a stable, protective film at the oil–water interface. In practice, about 2–5% by weight/volume is typically sufficient to achieve stable droplets without introducing excessive surfactant. Using too little leaves gaps in the interfacial film, increasing the risk of droplet coalescence and instability; using too much can alter rheology, cause foaming or other unwanted effects, and raise unnecessary costs. So the effective concentration is generally around 2–5% v/w.

Emulsifying agents must be present in enough quantity to cover the droplet surfaces and form a stable, protective film at the oil–water interface. In practice, about 2–5% by weight/volume is typically sufficient to achieve stable droplets without introducing excessive surfactant. Using too little leaves gaps in the interfacial film, increasing the risk of droplet coalescence and instability; using too much can alter rheology, cause foaming or other unwanted effects, and raise unnecessary costs. So the effective concentration is generally around 2–5% v/w.

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