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  2. Screaming jelly babies - Wikipedia

    en.wikipedia.org/wiki/Screaming_jelly_babies

    The liquid potassium chlorate decomposes into potassium perchlorate and potassium chloride. 4 KClO 3 → KCl + 3 KClO 4. The potassium perchlorate decomposes into potassium chloride and oxygen. KClO 4 → KCl + 2 O 2. The sugar in the candy reacts with oxygen, forming water and carbon dioxide. The reaction is exothermic and produces heat, smoke ...

  3. Pop Rocks - Wikipedia

    en.wikipedia.org/wiki/Pop_Rocks

    As described by a 1980 patent, the candy is made by dissolving sugars in water and is evaporated at 320 °F (160 °C) until the water content is 3% by mass. [10] The water and sugar mixture is then cooled to 280 °F (138 °C), and while being intensely stirred, it is pressurized with carbon dioxide at 730 pounds per square inch [psi] (50 atm). [10]

  4. Physical change - Wikipedia

    en.wikipedia.org/wiki/Physical_change

    Physical changes occur when objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances. In general a physical change is reversible using physical means.

  5. Chewing gum - Wikipedia

    en.wikipedia.org/wiki/Chewing_gum

    Flavor delivery is extended throughout the mastication process by timed release of different flavor components due to the physical-chemical properties of many of chewing gum's ingredients. During the first three to four minutes of the chew, bulking agents such as sugar or sorbitol and maltitol have the highest solubility and, therefore, are ...

  6. Sugar glass - Wikipedia

    en.wikipedia.org/wiki/Sugar_glass

    Sugar glass is made by dissolving sugar in water and heating it to at least the "hard crack" stage (approx. 150 °C / 300 °F) in the candy making process.Glucose or corn syrup is used to prevent the sugar from recrystallizing and becoming opaque, by disrupting the orderly arrangement of the molecules.

  7. Soda geyser - Wikipedia

    en.wikipedia.org/wiki/Soda_geyser

    A soda geyser is a physical reaction between a carbonated beverage, usually Diet Coke, and Mentos mints that causes the beverage to be expelled from its container. The candies catalyze the release of gas from the beverage, which creates an eruption that pushes most of the liquid up and out of the bottle.

  8. Hygroscopy - Wikipedia

    en.wikipedia.org/wiki/Hygroscopy

    If water molecules become suspended among the substance's molecules, adsorbing substances can become physically changed, e.g. changing in volume, boiling point, viscosity or some other physical characteristic or property of the substance. For example, a finely dispersed hygroscopic powder, such as a salt, may become clumpy over time due to ...

  9. List of purification methods in chemistry - Wikipedia

    en.wikipedia.org/wiki/List_of_purification...

    Evaporation removes volatile liquids from non-volatile solutes, which cannot be done through filtration due to the small size of the substances. Liquidliquid extraction removes an impurity or recovers a desired product by dissolving the crude material in a solvent in which other components of the feed material are soluble.