Understanding Soap as a Wetting Agent

What causes surface tension in water?

• The temperature of the water

• The presence of impurities in water

• The attraction between water molecules

• The repulsion between water molecules

How does the hydrophilic part of a soap molecule interact with water?

• It remains on the surface

• It dissolves in water

• It evaporates

• It repels water

What is the role of the hydrophobic part of a soap molecule?

• It remains outside the water

• It dissolves in water

• It increases surface tension

• It attracts water molecules

How does soap affect the surface tension of water?

• It makes the water evaporate faster

• It reduces the surface tension

• It has no effect on surface tension

• It increases the surface tension

Why is soap considered a wetting agent?

• It changes the color of water

• It reduces the surface tension, allowing water to wet surfaces more easily

• It makes water evaporate

• It increases the temperature of water