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Olfactory indicators : ウィキペディア英語版 | Olfactory indicators
An Olfactory indicator is a substance whose smell varies depending on whether it is mixed with an acidic or basic solution. Olfactory indicators can be used in the laboratory to test whether a solution is a base or an acid, a process called ''olfactory titration''. Onion , clove oil and vanilla extract are examples. They lose their smell with bases but not with acids. Olfactory indicators can be used to engage visually impaired students in laboratory work. ==External links==
* (【引用サイトリンク】title=Olfactory Titration )
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「Olfactory indicators」の詳細全文を読む
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