Types of Colloids: Lyophilic vs. Lyophobic

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What is the role of fluids in living systems according to the text?

To increase solubility of solute

To create heterogeneous mixtures

To serve as a complex mixture of colloids, ions, and molecules (correct)

To form homogeneous mixtures

In a binary solution, what defines a heterogeneous mixture?

Samples are not uniform in composition (correct)

Solvent cannot dissolve any more solute

Samples are identical throughout

Solvent dissolves any solute at a given temperature

What factors can affect the solubility of a substance?

Temperature and intermolecular forces (correct)

Type of bond between particles and pressure

Pressure and unsaturated solutions

Temperature and heterogeneous mixtures

How is an unsaturated solution defined?

A solution capable of dissolving more solute at a given temperature Signup and view all the answers

Which component of a solution is responsible for dissolving the solute?

Solvent Signup and view all the answers

What defines a saturated solution?

It has maximum solubility at that temperature Signup and view all the answers

Which type of colloid is known for being difficult to coagulate?

Lyophilic colloid Signup and view all the answers

What is the meaning of the term 'lyophilic'?

Liquid-loving Signup and view all the answers

Which term best describes colloids like silver and gold solutions?

Extrinsic colloids Signup and view all the answers

What characteristic makes lyophobic colloids unstable?

Little or no affinity for dispersion medium Signup and view all the answers

In which type of industrial products are colloids commonly used as thickening agents?

Lubricants and lotions Signup and view all the answers

Why do lyophobic colloids require special methods for preparation?

Little or no affinity for dispersion medium Signup and view all the answers

What is the main characteristic of a suspension?

Particle size greater than 1000 nm Signup and view all the answers

How can a suspension be separated?

Filtration Signup and view all the answers

Why does a suspension scatter a beam of light passing through it?

Large particle size Signup and view all the answers

What size range do particles in a suspension typically fall into?

Greater than 1000 nm Signup and view all the answers

Which statement best describes the stability of a suspension?

Unstable, settles after some time Signup and view all the answers

What can be observed when looking at a suspension under a microscope?

Particles that can be easily seen Signup and view all the answers

What is the main characteristic of a supersaturated solution?

It contains more solute than the maximum amount that will dissolve Signup and view all the answers

In a colloidal solution, what is the dispersed phase?

The substance that is dispersed within another Signup and view all the answers

What size range do colloidal particles typically fall into?

1 nanometer to 1 micrometer Signup and view all the answers

Why do colloidal particles not settle down due to gravity?

Because they have a negative charge that repels each other Signup and view all the answers

How can colloids be separated based on their properties?

By centrifugation Signup and view all the answers

What is the phenomenon called when a strong light beam is focused on a colloidal solution?

Tyndall effect Signup and view all the answers