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Properties of Colloidal Dispersions: Brownian Motion

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Properties of Colloidal Dispersions: Brownian Motion

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Questions and Answers

How does an increase in temperature affect Brownian motion in colloidal dispersions?

Has no effect on Brownian motion

Increases the Brownian motion of dispersed-phase particles (correct)

Reduces the velocity of the particles

Decreases the rate of diffusion

What is the function of Brownian motion in colloidal dispersions?

Contributing to the diffusion from a region of higher concentration to one of lower concentration

Regulating the rate of diffusion as per Fick’s first law

Causing colloidal particles to pursue an irregular and complicated zigzag path (correct)

Increasing the viscosity of the medium

What is the effect of decreasing particle size on the velocity of colloidal particles?

The velocity varies randomly

The velocity of the particles decreases

The velocity of the particles increases (correct)

The velocity remains constant

How does increasing the viscosity of the medium affect Brownian movement in colloidal dispersions?

<p>It decreases Brownian movement due to greater resistance to movement of the dispersed-phase particles</p> Signup and view all the answers

What does Fick’s first law express in relation to diffusion in colloidal dispersions?

<p>The rate of diffusion, expressed by J = dm/ A.dt = – D dC/dx</p> Signup and view all the answers

Properties of Colloidal Dispersions: Brownian Motion

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Podcast

Questions and Answers

How does an increase in temperature affect Brownian motion in colloidal dispersions?

What is the function of Brownian motion in colloidal dispersions?

What is the effect of decreasing particle size on the velocity of colloidal particles?

How does increasing the viscosity of the medium affect Brownian movement in colloidal dispersions?

What does Fick’s first law express in relation to diffusion in colloidal dispersions?

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