Powerful explosion and blackening of the melting yellow mixture
name: Explosion of the gunpowder-resembling mixture
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The exact mechanism of this reaction is unknown. However, you will notice that the mixture resembles gunpowder (potassium nitrate + sulfur + coal). The difference is only in one component (potassium carbonate instead of sulfur). In our view, the role of potassium carbonate in this experiment is as a source of carbon dioxide, which is released by its decomposition and prevents the slow combustion of the reaction mixture (sulfur, in particular) in the air. Due to this fact, after accumulating the necessary activation energy, first the reaction proceeds rapidly and with an explosion. The first reaction proceeds with the formation of a large number of byproducts. Shown only main products.