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Chapter 13: Problem 86

Choose the best answer: A colloidal dispersion of one liquid in another is called \((\mathbf{a})\) a gel, \((\mathbf{b})\) an emulsion, \((\mathbf{c})\) a foam (d) an aerosol.

Short Answer

Expert verified
The colloidal dispersion of one liquid in another is best described as an emulsion, where one liquid is dispersed throughout the other in the form of small droplets without actually mixing. So the correct answer is \((\mathbf{b})\) an emulsion.

Step by step solution

01

Definition of Gel

A gel is a semi-solid or jelly-like substance consisting of a solid framework in a continuous liquid phase.
02

Definition of Emulsion

An emulsion is a mixture of two immiscible liquids (liquids that do not mix), such as oil and water, in which one liquid is dispersed throughout the other in the form of small droplets.
03

Definition of Foam

A foam is a substance that is formed by trapping pockets of gas in a liquid or solid. Examples include whipped cream.
04

Definition of Aerosol

An aerosol is a suspension of fine solid particles or liquid droplets in a gas, such as air.
05

Identifying the Colloidal Dispersion of One Liquid in Another

Based on the definitions above, the colloidal dispersion of one liquid in another is best described as an emulsion. In an emulsion, the liquid particles are dispersed throughout the other liquid without actually mixing with it. This closely resembles the situation described in the exercise. So the correct answer is \((\mathbf{b})\) an emulsion.

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Most popular questions from this chapter

Lysozyme is an enzyme that breaks bacterial cell walls. A solution containing \(0.150 \mathrm{~g}\) of this enzyme in \(210 \mathrm{~mL}\) of solution has an osmotic pressure of \(0.127 \mathrm{kPa}\) at \(25^{\circ} \mathrm{C}\). What is the molar mass of lysozyme?

Consider water and glycerol, $\mathrm{CH}_{2}(\mathrm{OH}) \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_{2} \mathrm{OH}$. (a) Would you expect them to be miscible in all proportions? (b) List the intermolecular attractions that occur between a water molecule and a glycerol molecule.

Which of the following in each pair is likely to be more soluble in water: (a) cyclohexane \(\left(\mathrm{C}_{6} \mathrm{H}_{12}\right)\) or glucose \(\left(\mathrm{C}_{6} \mathrm{H}_{12} \mathrm{O}_{6}\right)\), (b) propionic acid \(\left(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COOH}\right)\) or sodium propionate $\left(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{COONa}\right),(\mathbf{c}) \mathrm{HCl}$ or ethyl chloride \(\left(\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}\right) ?\) Explain in each case.

A dilute aqueous solution of fructose in water is formed by dissolving $1.25 \mathrm{~g}\( of the compound in water to form \)0.150 \mathrm{~L}$ of solution. The resulting solution has an osmotic pressure of \(112.8 \mathrm{kPa}\) at \(20^{\circ} \mathrm{C}\). Assuming that the organic compound is a nonelectrolyte, what is its molar mass?

Glucose makes up about \(0.10 \%\) by mass of human blood. Calculate this concentration in (a) ppm, (b) molality. (c) What further information would you need to determine the molarity of the solution?
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