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L'esperimento della bottiglia blu consiste … L'esperimento della bottiglia blu consiste in una reazione chimica in cui, all'interno di una bottiglia chiusa, una soluzione acquosa contenente glucosio, idrossido di sodio e blu di metilene cambia da incolore a blu dopo essere scossa e poi si decolora in poco tempo. Dopo un ulteriore scuotimento ritorna il colore blu e questo ciclo può essere ripetuto diverse volte. Questo esperimento è una classica dimostrazione chimica e può essere utilizzata durante lezioni in laboratorio di chimica come esperimento di chimica generale. La reazione si innesca anche con altri zuccheri riducenti oltre al glucosio e anche con altri coloranti indicatori di ossidoriduzione.i coloranti indicatori di ossidoriduzione.
, La bouteille bleue est une expérience de c … La bouteille bleue est une expérience de chimie visant à montrer le pouvoir réducteur du glucose et l'oxydation d'une solution par le dioxygène de l'air. Elle doit son nom au fait que l'on observe une solution bleue perdre sa coloration puis redevenir bleue après agitation. Pour la réaliser on a besoin de :
* Soude
* Glucose
* Bleu de méthylène
* Erlenmeyer avec bouchon Tout d'abord la solution est bleue car l'oxygène dissous a oxydé le bleu de méthylène (indicateur coloré d'oxydo-réduction). Une réaction plus lente se met en place, la réduction par le glucose. Le bleu de méthylène réduit est incolore donc la solution perd sa couleur bleue. Si on agite l'erlenmeyer, on va aider le dioxygène gazeux de l'air à se dissoudre dans la bouteille et à la rendre bleue. On peut procéder de la sorte jusqu'à ce que tout le glucose soit oxydé. Le bleu de méthylène a ici un rôle de catalyseur redox, car il est l'intermédiaire de l'oxydation et de la réduction se déroulant entre le dioxygène et le glucose.éroulant entre le dioxygène et le glucose.
, Eksperimen botol biru adalah sebuah reaksi … Eksperimen botol biru adalah sebuah reaksi kimia. Sebuah benda cair yang mengandung glukosa, sodium hidroksida, dan sedikit udara dikocok dalam sebuah botol tertutup; cairan tersebut berubah dari tak berwarna menjadi biru dan kemudian kembali menjadi tak berwarna setelah itu. Saat kembali dikocok, siklus tersebut dapat berulang beberapa kali. Eksperimen tersebut adalah demonstrasi kimia klasik dan dapat dipakai dalam kursus-kursus laboratorium sebagai eksperimen kimia umum untuk mempelajari kinetik kimia dan mekanisme reaksi. Reaksi tersebut juga bekerja dengan reduktor lain selain glukosa dan pewarna indikator redoks lainnya selain metilene biru.kator redoks lainnya selain metilene biru.
, Blue bottle (en español, 'botella azul'), … Blue bottle (en español, 'botella azul'), es un proceso químico que consiste en colocar en un frasco cerrado una solución acuosa que contiene glucosa, hidróxido de sodio y azul de metileno. Este experimento es una demostración química clásica y puede ser utilizada en cursos de laboratorio como un experimento de química general. La reacción emplea otros azúcares reductores, además de la glucosa y también otros colorantes reductores o reactivos indicadores.rantes reductores o reactivos indicadores.
, The blue bottle experiment is a color-chan … The blue bottle experiment is a color-changing redox chemical reaction. An aqueous solution containing glucose, sodium hydroxide, methylene blue is prepared in a closed bottle containing some air. Upon standing, it spontaneously turns from blue to colorless due to reduction of methylene blue by the alkaline glucose solution. However, shaking the bottle oxidizes methylene blue back into its blue form. With further shaking, this color-change cycle can be repeated many times. This experiment is a classic chemistry demonstration that can be used in laboratory courses as a general chemistry experiment to study chemical kinetics and reaction mechanism. The reaction also works with other reducing agents besides glucose and other redox indicator dyes besides methylene blue.dox indicator dyes besides methylene blue.
, 蓝瓶实验（英語：Blue bottle），一种常见的化学示范实验。
, Unter dem Blue-Bottle-Experiment versteht … Unter dem Blue-Bottle-Experiment versteht man ein klassisches Schauexperiment der Chemie. In einem geschlossenen Gefäß befindet sich eine farblose Flüssigkeit und etwas Luft. Schüttelt man das Gefäß, so färbt sich die Flüssigkeit blau. Nach kurzer Zeit verschwindet die Farbe jedoch wieder. Je länger man schüttelt, desto länger bleibt die Färbung erhalten. Chemisch gesehen ist dieser Versuch auch als Modellversuch für ein Redoxsystem verwandt mit NAD+/NADH2 möglich. Außerdem ist die Schüttelzeit proportional zur Färbungszeit (Reaktion 1. Ordnung).al zur Färbungszeit (Reaktion 1. Ordnung).
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La bouteille bleue est une expérience de c … La bouteille bleue est une expérience de chimie visant à montrer le pouvoir réducteur du glucose et l'oxydation d'une solution par le dioxygène de l'air. Elle doit son nom au fait que l'on observe une solution bleue perdre sa coloration puis redevenir bleue après agitation. Pour la réaliser on a besoin de :
* Soude
* Glucose
* Bleu de méthylène
* Erlenmeyer avec bouchon Le bleu de méthylène a ici un rôle de catalyseur redox, car il est l'intermédiaire de l'oxydation et de la réduction se déroulant entre le dioxygène et le glucose.éroulant entre le dioxygène et le glucose.
, 蓝瓶实验（英語：Blue bottle），一种常见的化学示范实验。
, Unter dem Blue-Bottle-Experiment versteht … Unter dem Blue-Bottle-Experiment versteht man ein klassisches Schauexperiment der Chemie. In einem geschlossenen Gefäß befindet sich eine farblose Flüssigkeit und etwas Luft. Schüttelt man das Gefäß, so färbt sich die Flüssigkeit blau. Nach kurzer Zeit verschwindet die Farbe jedoch wieder. Je länger man schüttelt, desto länger bleibt die Färbung erhalten. Chemisch gesehen ist dieser Versuch auch als Modellversuch für ein Redoxsystem verwandt mit NAD+/NADH2 möglich. Außerdem ist die Schüttelzeit proportional zur Färbungszeit (Reaktion 1. Ordnung).al zur Färbungszeit (Reaktion 1. Ordnung).
, Blue bottle (en español, 'botella azul'), … Blue bottle (en español, 'botella azul'), es un proceso químico que consiste en colocar en un frasco cerrado una solución acuosa que contiene glucosa, hidróxido de sodio y azul de metileno. Este experimento es una demostración química clásica y puede ser utilizada en cursos de laboratorio como un experimento de química general. La reacción emplea otros azúcares reductores, además de la glucosa y también otros colorantes reductores o reactivos indicadores.rantes reductores o reactivos indicadores.
, L'esperimento della bottiglia blu consiste … L'esperimento della bottiglia blu consiste in una reazione chimica in cui, all'interno di una bottiglia chiusa, una soluzione acquosa contenente glucosio, idrossido di sodio e blu di metilene cambia da incolore a blu dopo essere scossa e poi si decolora in poco tempo. Dopo un ulteriore scuotimento ritorna il colore blu e questo ciclo può essere ripetuto diverse volte. Questo esperimento è una classica dimostrazione chimica e può essere utilizzata durante lezioni in laboratorio di chimica come esperimento di chimica generale. La reazione si innesca anche con altri zuccheri riducenti oltre al glucosio e anche con altri coloranti indicatori di ossidoriduzione.i coloranti indicatori di ossidoriduzione.
, The blue bottle experiment is a color-chan … The blue bottle experiment is a color-changing redox chemical reaction. An aqueous solution containing glucose, sodium hydroxide, methylene blue is prepared in a closed bottle containing some air. Upon standing, it spontaneously turns from blue to colorless due to reduction of methylene blue by the alkaline glucose solution. However, shaking the bottle oxidizes methylene blue back into its blue form. With further shaking, this color-change cycle can be repeated many times. This experiment is a classic chemistry demonstration that can be used in laboratory courses as a general chemistry experiment to study chemical kinetics and reaction mechanism. The reaction also works with other reducing agents besides glucose and other redox indicator dyes besides methylene blue.dox indicator dyes besides methylene blue.
, Eksperimen botol biru adalah sebuah reaksi … Eksperimen botol biru adalah sebuah reaksi kimia. Sebuah benda cair yang mengandung glukosa, sodium hidroksida, dan sedikit udara dikocok dalam sebuah botol tertutup; cairan tersebut berubah dari tak berwarna menjadi biru dan kemudian kembali menjadi tak berwarna setelah itu. Saat kembali dikocok, siklus tersebut dapat berulang beberapa kali. Eksperimen tersebut adalah demonstrasi kimia klasik dan dapat dipakai dalam kursus-kursus laboratorium sebagai eksperimen kimia umum untuk mempelajari kinetik kimia dan mekanisme reaksi. Reaksi tersebut juga bekerja dengan reduktor lain selain glukosa dan pewarna indikator redoks lainnya selain metilene biru.kator redoks lainnya selain metilene biru.
|
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Eksperimen botol biru
, Bottiglia blu
, Bouteille bleue
, Blue bottle
, Blue bottle experiment
, 蓝瓶实验
, Blue-Bottle-Experiment
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