Chapter 15, Problem 28R

To determine

The correct answers for the table using the colloids smoke, marshmallow, fog and paint.

Explanation of Solution

Introduction:

A homogenous composition in which particles of one substance stands dispersed all around uniformly into the other substance is known as colloid.

The formation of smoke occurs due to incomplete combustion. During this process, the unburned particles become suspended in air or gas. Hence, smoke is an example of solid in gas.

A marshmallow is solid foam that is formed due to mixing of sugar and gelatin. It contains tiny bubbles or gas. Hence, marshmallow is an example of gas in a solid colloid.

The formation of fog occurs due to condensation of water vapor or liquid into the air. These tiny water droplets are suspended in the air. Hence, the fog is an example of liquid in a gas.

The main composition of paint is resins, solvents, additives and pigments. The minute particles of pigment remain suspended uniformly into the solvents. Hence, paint is an example of solid into the liquid colloid.

The given table is filled as:

Common Colloids
Colloid	Example
Solid in a liquid	gelatin
Solid in a gas	smoke
Gas in a solid	marshmallow
Solid in a liquid	paint
Liquid in a gas	fog

Conclusion:

Thus, the complete table is shown above.