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Chapter 13: Problem 86

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

Short Answer

Expert verified
The best answer is (b) an emulsion, as it is the correct term for a colloidal dispersion of one liquid in another.

Step by step solution

01

Understand the terms

(a) A gel is a semi-solid system made up of a solid-like network dispersed in a liquid. It is not a colloidal dispersion of one liquid in another. (b) An emulsion is a mixture of two liquids that don't dissolve in each other with one liquid being dispersed as tiny droplets in the other liquid. It is a colloidal dispersion of one liquid in another. (c) A foam is a substance that is formed by trapping air or gas bubbles inside a liquid or solid. It is not a colloidal dispersion of one liquid in another. (d) An aerosol is a suspension of fine solid or liquid particles in a gas. It is not the colloidal dispersion of one liquid in another.
02

Choose the best answer

Out of the given options, (b) an emulsion is the correct term for a colloidal dispersion of one liquid in another. Therefore, the answer is (b) an emulsion.

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Most popular questions from this chapter

By referring to Figure 13.15, determine whether the addition of \(40.0 \mathrm{~g}\) of each of the following ionic solids to \(100 \mathrm{~g}\) of water at \(40^{\circ} \mathrm{C}\) will lead to a saturated solution: (a) \(\mathrm{NaNO}_{3}\), (b) \(\mathrm{KCl}_{\text {, }}\) (c) \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\), (d) \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\)

(a) Do colloids made only of gases exist? Why or why not? (b) In the 1850 's, Michael Faraday prepared ruby-red colloids of gold nanoparticles in water that are still stable today. These brightly colored colloids look like solutions. What experiment(s) could you do to determine whether a given colored preparation is a solution or colloid?

Two nonpolar organic liquids, hexane \(\left(\mathrm{C}_{6} \mathrm{H}_{14}\right)\) and heptane \(\left(\mathrm{C}_{7} \mathrm{H}_{16}\right)\), are mixed. (a) Do you expect \(\Delta H_{\text {soln }}\) to be a large positive number, a large negative number, or close to zero? Explain. (b) Hexane and heptane are miscible with each other in all proportions. In making a solution of them, is the entropy of the system increased, decreased, or close to zero, compared to the separate pure liquids?

By referring to Figure 13.15, determine the mass of each of the following salts required to form a saturated solution in \(250 \mathrm{~g}\) of water at \(30^{\circ} \mathrm{C}\) : (a) \(\mathrm{KClO}_{3}\), (b) \(\mathrm{Pb}\left(\mathrm{NO}_{3}\right)_{2}\), (c) \(\mathrm{Ce}_{2}\left(\mathrm{SO}_{4}\right)_{3}\).

(a) What is the mass percentage of iodine in a solution containing \(0.035 \mathrm{~mol} \mathrm{I}_{2}\) in \(125 \mathrm{~g}\) of \(\mathrm{CCl}_{4}\) ? (b) Seawater contains \(0.0079 \mathrm{~g}\) of \(\mathrm{Sr}^{2+}\) per kilogram of water. What is the concentration of \(\mathrm{Sr}^{2+}\) in \(\mathrm{Ppm}\) ?
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