Surface Properties and Colloidal Systems Flashcard 1

Front

What is a surface in terms of material interaction?

Back

The boundary between two phases

Front

Which of the following is NOT an interface type? Solid/Liquid, Liquid/Vapor, Vapor/Vapor, Solid/Solid

Back

Vapor/Vapor

Front

Surface tension is caused by:

Back

Molecular forces at liquid interfaces

Front

Which liquid has the highest surface tension? Alcohol, Water, Oil, Acetone

Back

Water

Front

Contact angle is used to measure:

Back

Wettability

Front

A contact angle close to 0° indicates:

Back

High wetting

Front

Which of the following is an example of adsorption in pharmaceuticals? Activated charcoal removing toxins, Boiling water, Freezing drugs, Increasing temperature

Back

Activated charcoal removing toxins

Front

In solid-liquid interfaces, what stabilizes particles?

Back

Surface-active agents

Front

What is Brownian motion?

Back

Erratic movement due to molecular collisions

Front

What causes diffusion in colloidal particles?

Back

Brownian motion