How to Dramatically Demonstrate a Decomposition Reaction

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This chemical volcano is a result of the decomposition of Ammonium Dichromate.

A decomposition reaction (aka analysis reaction) follows the general formula below

A--> B + C

A compound breaks down into smaller components.

This is the demonstration of the decomposition of Ammonium Dichromate

(NH4)2Cr2O7 ---> N2 + 4H2O + Cr2O3

Cr2O3 -the green solid

Notes

Chromium III and chromium VI, as well at its compounds, including ammonium dichromate, are known carcinogens. Chromium will irritate the mucous membranes. Therefore, take care to perform this demonstration in a well-ventilated area (preferably a ventilation hood) and avoid skin contact or inhalation of the materials. Wear gloves and safety goggles when handling ammonium dichromate.

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    15 Discussions

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    antienoob

    9 years ago on Introduction

    were could i find the materials needed for this. cose i so wont to try this at home.

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    pwest71

    9 years ago on Introduction

    Any way to make a similar effect, but safe for in a home? Looking to make a "faux" volcano/waterfall.....

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    duckman1970

    9 years ago on Introduction

    yah it worked whoooo BANG! ahhh ahhhhh ahhhhhhh sick volcano man

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    szechuan53

    10 years ago on Introduction

    very nice I also needed a shovel (I just used a little beach shovel though)

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    The Fallen

    10 years ago on Introduction

    this is a decomposition reaction, where is all the energy coming from? breaking bonds requires energy, correct?

    2 replies
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    tubajoey1

    10 years ago on Introduction

    where might i get the materials for this? like, somewhere i could go locally, not the internet. thanks!

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    GorillazMiko

    11 years ago on Introduction

    Looks awesomely awesome to the most awesomeness of awesome, keep up the great videos!