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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dilution (equation) ： ウィキペディア英語版 Dilution (equation) Dilution is a reduction in the pH of a chemical (gas, vapor, solution). It is the process of decreasing the concentration of a solute in solution, usually simply by mixing with more solvent. To dilute a solution means to add more solvent without the addition of more solute. The resulting solution is thoroughly mixed so as to ensure that all parts of the solution are identical. The same direct relationship applies to gases and vapors diluted in air for example. Although, thorough mixing of gases and vapors may not be as easily accomplished. For example, if there are 10 grams of salt (the solute) dissolved in 1 litre of water (the solvent), this solution has a certain salt concentration/molarity. If one adds 1 litre of water to this solution the salt concentration is reduced. The diluted solution still contains 10 grams of salt/(0.171 moles of NaCl). Mathematically this relationship can be shown in the equation: :$C\_1\backslash times\; V\_1\; =\; C\_2\backslash times\; V\_2$ Where: :$C\_1\; =$ Initial concentration or molarity. :$V\_1\; =$ Initial volume. :$C\_2\; =$ Final concentration or molarity. :$V\_2\; =$ Final volume ==Basic Room Purge Equation== The ''Basic Room Purge Equation'', is used in industrial hygiene. It determines the time required to reduce a known vapor concentration existing in a closed space to a lower vapor concentration. The equation can only be applied when the purged volume of vapor or gas is replaced with "clean" air or gas. For example, the equation can be used to calculate the time required at a certain ventilation rate to reduce a high carbon monoxide concentration in a room. :$\backslash \; D\_t=\backslash left\; (\backslash frac\; \backslash right)\; \backslash cdot\; ln\backslash left\; (\backslash frac\}\backslash right)\; \backslash quad$ Sometimes the equation is also written as: :$\backslash \; ln\backslash left\; (\backslash frac\}\backslash right)\; \backslash quad=\backslash frac\; \backslash cdot\; (t\_-t\_)\backslash quad$ where $t\_\; =\; 0$ $D\_t\; =$ Time required; the unit of time used is the same as is used for $Q$. $V\; =$ Air or gas volume of the closed space or room in cubic feet, cubic meters or liters $Q\; =$ Ventilation rate into or out of the room in cubic feet per minute, cubic meters per hour or liters per second $C\_\; =$ Initial concentration of a vapor inside the room measured in ppm $C\_\; =$ Final reduced concentration of the vapor inside the room in ppm 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dilution (equation)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.