Certified Instrument Specialist (CIS) 2025 Practice Exam – 400 Free Practice Questions to Pass the Exam

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What is the definition of a cationic agent?

Negatively charged

Positively charged

A cationic agent is defined as a substance that carries a positive charge. This characteristic is essential in various applications, particularly in chemistry and biology, where the behavior of ions can significantly influence interactions with other molecules and compounds. Cationic agents commonly include substances such as cationic surfactants, which are often used in detergents and fabric softeners, due to their ability to interact effectively with negatively charged surfaces and enhance cleaning and conditioning effects.

Understanding that cationic agents are positively charged also helps clarify their role in processes like flocculation, where they can neutralize negative charges on particles, facilitating their aggregation and removal from solutions. This knowledge is fundamental for those in fields that study chemistry or work with materials and products involving ionic interactions.

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Neutral charge

Variable charge

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