dilute solution

• 希釈溶液、希釈水溶液、希薄溶液

WordNet

1. a homogeneous mixture of two or more substances; frequently (but not necessarily) a liquid solution; "he used a solution of peroxide and water"
2. the successful action of solving a problem; "the solution took three hours"
3. a statement that solves a problem or explains how to solve the problem; "they were trying to find a peaceful solution"; "the answers were in the back of the book"; "he computed the result to four decimal places" (同)answer, result, resolution, solvent
4. the set of values that give a true statement when substituted into an equation (同)root
5. a method for solving a problem; "the easy solution is to look it up in the handbook"
6. lessen the strength or flavor of a solution or mixture; "cut bourbon" (同)thin, thin_out, reduce, cut
7. reduced in strength or concentration or quality or purity; "diluted alcohol"; "a dilute solution"; "dilute acetic acid" (同)dilute

PrepTutorEJDIC

1. 〈U〉(問題などを)『解くこと』,解明,解決法《+『of』(『for, to』)+『名』》 / 〈C〉(問題などの)『解答』,説明《+『of』(『to, for』)+『名』》 / 〈C〉〈U〉(…の)『溶液』《+『of』+『名』》 / 〈U〉溶解
2. (…で)〈液体〉‘を'薄める《+『名』+『with』+『名』》 / 〈力・効力など〉‘を'弱める / (液体などが)薄い

Wikipedia preview

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2018/03/21 12:33:56」(JST)

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This article is about chemical solutions. For other uses, see Solution (disambiguation).

"Solute" redirects here. For the sole order of the class Homoiostelea, see Solute (echinoderm).

Making a saline water solution by dissolving table salt (NaCl) in water. The salt is the solute and the water the solvent.

In chemistry, a solution is a homogeneous mixture composed of two or more substances. In such a mixture, a solute is a substance dissolved in another substance, known as a solvent. The mixing process of a solution happens at a scale where the effects of chemical polarity are involved, resulting in interactions that are specific to solvation. The solution assumes the phase of the solvent when the solvent is the larger fraction of the mixture, as is commonly the case. The concentration of a solute in a solution is the mass of that solute expressed as a percentage of the mass of the whole solution.

Characteristics

• A solution is a homogeneous mixture of two or more substances.
• The particles of solute in a solution cannot be seen by the naked eye.
• A solution does not allow beams of light to scatter.
• A solution is stable.
• The solute from a solution cannot be separated by filtration (or mechanically).
• It is composed of only one phase.

Types

Homogeneous means that the components of the mixture form a single phase. Heterogeneous means that the components of the mixture are of different phase. The properties of the mixture (such as concentration, temperature, and density) can be uniformly distributed through the volume but only in absence of diffusion phenomena or after their completion. Usually, the substance present in the greatest amount is considered the solvent. Solvents can be gases, liquids or solids. One or more components present in the solution other than the solvent are called solutes. The solution has the same physical state as the solvent.

Gaseous solutions

If the solvent is a gas, only gases are dissolved under a given set of conditions. An example of a gaseous solution is air (oxygen and other gases dissolved in nitrogen). Since interactions between molecules play almost no role, dilute gases form rather trivial solutions. In part of the literature, they are not even classified as solutions, but addressed as mixtures.

Liquid solutions

If the solvent is a liquid, then almost all gases, liquids, and solids can be dissolved. Here are some examples:

• Gas in liquid:
  • Oxygen in water
  • Carbon dioxide in water – a less simple example, because the solution is accompanied by a chemical reaction (formation of ions). Note also that the visible bubbles in carbonated water are not the dissolved gas, but only an effervescence of carbon dioxide that has come out of solution; the dissolved gas itself is not visible since it is dissolved on a molecular level.
• Liquid in liquid:
  • The mixing of two or more substances of the same chemistry but different concentrations to form a constant. (Homogenization of solutions)
  • Alcoholic beverages are basically solutions of ethanol in water.
• Solid in liquid:
  • Sucrose (table sugar) in water
  • Sodium chloride (NaCl) (table salt) or any other salt in water, which forms an electrolyte: When dissolving, salt dissociates into ions.
• Solutions in water are especially common.

Counter examples are provided by liquid mixtures that are not homogeneous: colloids, suspensions, emulsions are not considered solutions.

Body fluids are examples for complex liquid solutions, containing many solutes. Many of these are electrolytes, since they contain solute ions, such as potassium. Furthermore, they contain solute molecules like sugar and urea. Oxygen and carbon dioxide are also essential components of blood chemistry, where significant changes in their concentrations may be a sign of severe illness or injury.

Solid solutions

If the solvent is a solid, then gases, liquids and solids can be dissolved.

• Gas in solids:
  • Hydrogen dissolves rather well in metals, especially in palladium; this is studied as a means of hydrogen storage.
• Liquid in solid:
  • Mercury in gold, forming an amalgam
  • Water in solid salt or sugar, forming moist solids
  • Hexane in paraffin wax
• Solid in solid:
  • Steel, basically a solution of carbon atoms in a crystalline matrix of iron atoms
  • Alloys like bronze and many others
  • Polymers containing plasticizers

Solubility

Main articles: Solubility and Solvation

The ability of one compound to dissolve in another compound is called solubility. When a liquid can completely dissolve in another liquid the two liquids are miscible. Two substances that can never mix to form a solution are called immiscible.

All solutions have a positive entropy of mixing. The interactions between different molecules or ions may be energetically favored or not. If interactions are unfavorable, then the free energy decreases with increasing solute concentration. At some point the energy loss outweighs the entropy gain, and no more solute particles can be dissolved; the solution is said to be saturated. However, the point at which a solution can become saturated can change significantly with different environmental factors, such as temperature, pressure, and contamination. For some solute-solvent combinations a supersaturated solution can be prepared by raising the solubility (for example by increasing the temperature) to dissolve more solute, and then lowering it (for example by cooling).

Usually, the greater the temperature of the solvent, the more of a given solid solute it can dissolve. However, most gases and some compounds exhibit solubilities that decrease with increased temperature. Such behavior is a result of an exothermic enthalpy of solution. Some surfactants exhibit this behaviour. The solubility of liquids in liquids is generally less temperature-sensitive than that of solids or gases.

Properties

The physical properties of compounds such as melting point and boiling point change when other compounds are added. Together they are called colligative properties. There are several ways to quantify the amount of one compound dissolved in the other compounds collectively called concentration. Examples include molarity, volume fraction, and mole fraction.

The properties of ideal solutions can be calculated by the linear combination of the properties of its components. If both solute and solvent exist in equal quantities (such as in a 50% ethanol, 50% water solution), the concepts of "solute" and "solvent" become less relevant, but the substance that is more often used as a solvent is normally designated as the solvent (in this example, water).

Liquid

See also: Solvent § Solvent classifications

In principle, all types of liquids can behave as solvents: liquid noble gases, molten metals, molten salts, molten covalent networks, and molecular liquids. In the practice of chemistry and biochemistry, most solvents are molecular liquids. They can be classified into polar and non-polar, according to whether their molecules possess a permanent electric dipole moment. Another distinction is whether their molecules can form hydrogen bonds (protic and aprotic solvents). Water, the most commonly used solvent, is both polar and sustains hydrogen bonds.

Water is a good solvent because the molecules are polar and capable of forming hydrogen bonds (1).

Salts dissolve in polar solvents, forming positive and negative ions that are attracted to the negative and positive ends of the solvent molecule, respectively. If the solvent is water, hydration occurs when the charged solute ions become surrounded by water molecules. A standard example is aqueous saltwater. Such solutions are called electrolytes.

Polar solutes dissolve in polar solvents, forming polar bonds or hydrogen bonds. As an example, all alcoholic beverages are aqueous solutions of ethanol. On the other hand, non-polar solutes dissolve better in non-polar solvents. Examples are hydrocarbons such as oil and grease that easily mix with each other, while being incompatible with water.

An example for the immiscibility of oil and water is a leak of petroleum from a damaged tanker, that does not dissolve in the ocean water but rather floats on the surface.

Preparation from constituent ingredients

It is common practice in laboratories to make a solution directly from its constituent ingredients. There are three cases in practical calculation:

• Case 1: amount of solvent volume is given.
• Case 2: amount of solute mass is given.
• Case 3: amount of final solution volume is given.

In the following equations, A is solvent, B is solute, and C is concentration. Solute volume contribution is considered through ideal solution model.

• Case 1: amount (mL) of solvent volume V_A is given. Solute mass m_B = C V_A d_A /(100-C/d_B)
• Case 2: amount of solute mass m_B is given. Solvent volume V_A = m_B (100/C-1/ d_B )
• Case 3: amount (mL) of final solution volume Vt is given. Solute mass m_B = C Vt /100; Solvent volume V_A=(100/C-1/ d_B) m_B
• Case 2: solute mass is known, V_A = m_B 100/C
• Case 3: total solution volume is known, same equation as case 1. V_A=Vt; m_B = C V_A /100

Example: Make 2 g/100mL of NaCl solution with 1 L water Water (properties). The density of resulting solution is considered to be equal to that of water, statement holding especially for dilute solutions, so the density information is not required.

m_B = C V_A =( 2 / 100 ) x 1000 =20 g

See also

• Molar solution
• Percentage solution (disambiguation)
• Solubility equilibrium
• Stock solution
• Total dissolved solids is a common term in a range of disciplines, and can have different meanings depending on the analytical method used. In water quality, it refers to the amount of residue remaining after evaporation of water from a sample.
• Upper critical solution temperature
• Lower critical solution temperature
• Coil-globule transition

References

• IUPAC, Compendium of Chemical Terminology, 2nd ed. (the "Gold Book") (1997). Online corrected version:  (2006–) "solution".

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English Journal

• General electrokinetic model for concentrated suspensions in aqueous electrolyte solutions: Electrophoretic mobility and electrical conductivity in static electric fields.

• Carrique F1, Ruiz-Reina E2, Roa R3, Arroyo FJ4, Delgado ÁV5.
• Journal of colloid and interface science.J Colloid Interface Sci.2015 Oct 1;455:46-54. doi: 10.1016/j.jcis.2015.05.023. Epub 2015 May 16.
• In recent years different electrokinetic cell models for concentrated colloidal suspensions in aqueous electrolyte solutions have been developed. They share some of its premises with the standard electrokinetic model for dilute colloidal suspensions, in particular, neglecting both the specific role
• PMID 26051031

• Transient and quasi-permanent networks in xyloglucan solutions.

• de Freitas RA1, Spier VC2, Sierakowski MR2, Nicolai T3, Benyahia L3, Chassenieux C3.
• Carbohydrate polymers.Carbohydr Polym.2015 Sep 20;129:216-23. doi: 10.1016/j.carbpol.2015.04.066. Epub 2015 May 8.
• Viscoelastic properties of aqueous solutions of xyloglucan extracted from Hymenaea courbaril seeds (Jatobá gum) were investigated by rheology over a wide range of concentrations and temperatures. The polymer was characterized in dilute solutions by light scattering measurements and size exclusion c
• PMID 26050908

• Persistent phototransformation products of vardenafil (Levitra®) and sildenafil (Viagra®).

• Herbert LP1, Becker-Krail DB1, Cory WC2.
• Chemosphere.Chemosphere.2015 Sep;134:557-62. doi: 10.1016/j.chemosphere.2014.12.011. Epub 2015 Jan 10.
• As pharmaceutically active compounds (PhACs) are increasingly detected in the aquatic environment, the importance of investigating their transformation products-products of naturally occurring hydrolysis, biodegradation, and solar-mediated photochemical reactions - for persistence and ecotoxicity re
• PMID 25585868

Japanese Journal

• A Theory of Solvation Effects on Viscosity

• Yamakita Tomofumi,Yoshimori Akira
• Journal of the Physical Society of Japan 84(4), 2015-03-20
• NAID 160000000653

• SAPO-34膜のマイクロ波加熱合成における急速加熱効果

• 廣田 雄一朗,田村 真吾,下山 裕介,伊東 章
• 化学工学論文集 41(4), 228-232, 2015
• 近年，マイクロ波加熱（MW加熱）を利用した新たなゼオライト膜の開発が進められており，合成時間が短縮されることが報告されている．しかしながら，MW加熱がゼオライト膜形成過程におよぼす効果はいまだ明らかになっていない．本報告では，マイクロ波加熱および電気炉加熱（CE加熱）を利用し，濃度の異なる2種類の合成溶液からゼオライト類似化合物SAPO-34膜を合成し，その形成過程を比較した．その結果，MW加熱を …
• NAID 130005088108

• Removal of Toxic Anions in Aqueous Solution by Anion Exchanger Synthesized from Steelmaking Slag (第12回 資源リサイクル・材料科学に関する日韓国際シンポジウム特集)

• MURAYAMA Norihiro,TAKAGI Tomoaki,TSUDA Takashi [他],MORIYAMA Kai,SHIBATA Junji,UDAGAWA Etsuro
• 環境資源工学 62(1), 24-29, 2015
• … The adsorption of toxic anions including As(III), B, Cr(VI) and Se(IV) in aqueous solution was investigated in order to clarify the removal property of anionic species by the obtained products. … It is found that the steelmaking slag-derived LDHs are applicable as an anion removal agent for the dilute aqueous solution containing anionic species. …
• NAID 130005084015

Related Links

• What is dilute solution - Wiki Answers

How do you dilute a solution from a concentrated solution? its very simple! to make a concentrated solution dilute, all you have to do is add a little water to it! What is a dilute solution? A dilute solution is a liquid consisting of a chemical of ...

• Solution Dilution Calculator | Sigma-Aldrich

This solution dilution calculator tool from Sigma-Aldrich.com calculates the volume of stock concentrate to add to achieve a specified volume and concentration using the formula M1V1 = M2V2.

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★リンクテーブル★

リンク元	「希薄溶液」「希釈溶液」「希釈水溶液」
関連記事	「solution」「dilute」

「希薄溶液」

　　[★]

英

dilute solution

関

希釈水溶液、希釈溶液

「希釈溶液」

　　[★]

英

dilute solution

関

希薄溶液、希釈水溶液

「希釈水溶液」

　　[★]

英

dilute solution

関

希薄溶液、希釈溶液

「solution」

　　[★]

• n.

• 溶液、溶解液、水溶液、溶体、解決、解答、解法

関

answer、aq、aqueous solution、resolution、resolve、settle、solve、unravel

　 　 　 　 　 　

「dilute」

　　[★]

• 希釈する、(濃度が)薄い、希薄な

関

attenuant、dilution、rare、tenuous、thin