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Ch.4 - Reactions in Aqueous Solution
Brown - Chemistry: The Central Science 14th Edition
Brown14th EditionChemistry: The Central ScienceISBN: 9780134414232당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Brown 14th EditionCh.4 - Reactions in Aqueous Solution문제 13.86d
4장, 문제 13.86d

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

검증된 단계별 안내
1
Identify the key terms in the question: 'colloidal dispersion' and 'one liquid in another'.
Recall the definition of a colloid: a mixture where one substance is dispersed evenly throughout another.
Understand that when both substances in a colloid are liquids, it is specifically called an emulsion.
Review the options: (a) gel, (b) emulsion, (c) foam, (d) aerosol.
Recognize that an emulsion is the correct term for a colloidal dispersion of one liquid in another.

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주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Colloidal Dispersion

A colloidal dispersion is a mixture where tiny particles of one substance are evenly distributed throughout another substance. These particles are larger than molecules but too small to be seen with the naked eye. Colloids can exist in various forms, including solid, liquid, or gas, and their stability is influenced by factors such as particle size and charge.
추천 영상:
가이드 코스
02:38
Suspensions and Colloids

Emulsion

An emulsion is a specific type of colloidal dispersion where one liquid is dispersed in another liquid with which it is usually immiscible, such as oil in water. Emulsions are stabilized by emulsifying agents that reduce the surface tension between the two liquids. Common examples include mayonnaise and salad dressings, which demonstrate how emulsions can be both stable and useful in culinary applications.

Types of Colloids

Colloids can be classified into various types based on the phases of the dispersed and continuous mediums. For instance, a gel is a solid dispersed in a liquid, a foam is a gas dispersed in a liquid, and an aerosol is a solid or liquid dispersed in a gas. Understanding these classifications helps in identifying the correct terminology and properties associated with different colloidal systems.
추천 영상:
가이드 코스
02:38
Suspensions and Colloids
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교과서 질문

Would you expect that an anion would be physically closer to the oxygen or to the hydrogens of water molecules that surround it in solution?

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State whether each of the following statements is true or false. Justify your answer in each case. (b) If you add a nonelectrolyte to an aqueous solution that already contains an electrolyte, the electrical conductivity will not change.

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교과서 질문

We have learned in this chapter that many ionic solids dissolve in water as strong electrolytes; that is, as separated ions in solution. Which statement is most correct about this process? (a) Water is a strong acid and therefore is good at dissolving ionic solids. (b) Water is good at solvating ions because the hydrogen and oxygen atoms in water molecules bear partial charges. (c) The hydrogen and oxygen bonds of water are easily broken by ionic solids.

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교과서 질문

(b) In the 1850s, 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?

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교과서 질문

State whether each of the following statements is true or false. Justify your answer in each case. (a) Electrolyte solutions conduct electricity because electrons are moving through the solution.

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