User:Cheerios1028/Screaming jelly babies

Lead
"Screaming Jelly Babies" (British English), also known as "Growling Gummy Bears" (American and Canadian English), is a classroom chemistry demonstration which is practiced in schools around the world. It is often used at open evenings to show the more engaging and entertaining aspects of secondary school science.

Article body
The experiment shows the amount of energy there is in a piece of candy. Jelly babies or gummy bears are often used for theatrics. Potassium chlorate, a strong oxidising agent, rapidly oxidises the sugar in the candy causing it to burst into flames. The reaction produces a "screaming" sound as rapidly expanding gases are emitted from the test tube. The aroma of caramel is given off.

Net Reaction

4 KClO3 (s) + C12H22O11 (s) + 6 O2 (g) → 4KCl + 12 CO2 (g) + 11 H2O (g)

==== Mechanism ==== The solid potassium chlorate is melted into a liquid.

KClO3 (s) + energy → K+ClO3- (l)

The liquid potassium chlorate decomposes into potassium perchlorate and potassium chloride.

4 KClO3 → KCl + 3 KClO4

The potassium perchlorate decomposes into potassium chloride and oxygen.

KClO4 → KCl + 2 O2

The sugar in the candy reacts with oxygen, forming water and carbon dioxide. The reaction is exothermic and produces heat, smoke, and fire.

C12H22O11 (s) + 12O2 (g) → 12 CO2 (g) + 11 H2O (g) + energy

Safety Measures

The experiment should be completed with the proper safety measures as it can be hazardous. Alongside typical chemical safety procedures (hyperlink??), these include: performing the experiment in a fume hood or a well-ventilated area, using a safety shield and???

Safety Measures
Care should be taken in performing this experiment, which should only be attempted by a professional. Potassium chlorate is a strong oxidizer and can cause fire or explosions. It is toxic by inhalation or ingestion and is hazardous to aquatic environments. Reagent grade potassium chlorate should be used. Upon completion of the demonstration, all chemicals should be disposed of in designated chemical waste containers to prevent harm to people or the environment.

All participants in the experiment should wear personal protective equipment, including eye protection, and should stand a safe distance away from the demonstration. A face-shield and heat resistant gloves should be worn by the person adding the jelly baby to the molten potassium chlorate.

Variations
Deviation from the experiment is not recommended, and has been linked with accidents. Candy with low moisture content or high surface area may cause explosions.

Ĉefo
"Screaming Jelly Babies" (Brita Angla), ankaŭ konata kiel "Growling Gummy Bears" (Usona kaj Kanada Angla), estas klasĉambra kemiomonstraĵo kiu estas praktikata en lernejoj ĉirkaŭ la mondo. Ĝi estas ofte uzata ĉe malfermaj vesperoj por montri la pli allogajn kaj distrajn aspektojn de mezlerneja scienco.

Artikolo korpo
La eksperimento montras la kvanton de energio kiu estas en peco de sukeraĵo, ĵeleobeboj aŭ gumaj ursoj estas ofte uzataj. Kalia klorato, forta oksigena agento rapide oksigenas la sukeron en la sukeraĵo igante ĝin eksplodi en flamojn. La reago produktas "krian" sonon kiam rapide disetendiĝantaj gasoj estas elsenditaj de la provtubo. La aromo de karamelo estas eligita.

Mekanismo
La solida kalia klorato estas fandita en likvaĵon.

KClO3 (s) + energio → K+ClO3- (l)

Kalia perklorato kaj kalia klorido formiĝas.

4 KClO3 → KCl + 3 KClO4

La kalio perklorato putriĝas en kalio klorido kaj oksigeno.

KClO4 → KCl + 2 O2

La sukero en la sukeraĵo reagas kun oksigeno, formante akvon kaj karbon dioksidon. La reago estas eksterterma kaj produktas varmon, fumon kaj fajron.

C12H22O11 (s) + 12O2 (g) → 12 CO2 (g) + 11 H2O (g) + energio