The Science of Clean: Understanding Surfactants in Our Daily Products

The video explores the science behind cleaning products like shower gels, shampoos, and washing up liquids. It explains how dirt interacts with skin and the role of surfactants in removing it. The video also compares the cleaning actions of shampoos and washing up liquids, highlighting the use of enzymes for more effective cleaning. Foam is discussed as a visual indicator rather than a cleaning agent.

What is the primary reason dirt adheres to our skin?

• Dirt is composed of residues that bond with fat.

• Dirt is primarily made of water-soluble particles.

• Dirt is repelled by the skin's natural oils.

• Dirt is hydrophilic and bonds with water.

How do surfactants in shower gels and shampoos help in cleaning?

• They dissolve dirt directly without water.

• They create a barrier between dirt and skin.

• They bond with both water and fat to remove dirt.

• They evaporate dirt particles into the air.

Why do shampoos and shower gels foam?

• Foam is essential for cleaning dirt.

• Foam helps in mixing water and air.

• Foam is a byproduct of surfactants stabilizing contact zones.

• Foam is created to make the product last longer.

What is the main purpose of foam in shampoos?

• To enhance the cleaning power of the shampoo.

• To make the shampoo smell better.

• To ensure no spot is missed during washing.

• To reduce the amount of shampoo needed.

How do dishwashing liquids differ from shampoos in their cleaning action?

• They contain more aggressive surfactants.

• They do not contain any surfactants.

• They use less surfactants than shampoos.

• They are designed to clean only oils.

What role do enzymes play in dishwashing liquids?

• They make the liquid more viscous.

• They break down large molecules like starch.

• They enhance the scent of the liquid.

• They increase the foam production.

Why are enzymes added to modern dishwashing formulas?

• To make the liquid more colorful.

• To dissolve starch and other stubborn stains.

• To increase the shelf life of the product.

• To reduce the cost of production.