Search results
Results from the WOW.Com Content Network
The carbon snake is a demonstration of the dehydration reaction of sugar by concentrated sulfuric acid. With concentrated sulfuric acid, granulated table sugar performs a degradation reaction which changes its form to a black solid-liquid mixture. [1] The carbon snake experiment can sometimes be misidentified as the black snake, "sugar snake ...
Black snake experiment. Unlike the carbon snake, which involves the reaction of sulfuric acid instead of sodium bicarbonate, the sugar snake grows relatively faster and to a significantly larger volume. Sucrose: Sodium bicarbonate (4:1) placed on top of sand and ethanol. Solid fuel is used in this experiment.
Sulfuric acid (American spelling ... Dehydration of table sugar (sucrose) is a common laboratory demonstration. [21] The sugar darkens as carbon is formed, and a ...
In 1811, he became the first person to convert starch into a sugar , by heating it with sulfuric acid in acid-catalyzed reaction. [1] This sugar was eventually named glucose. [2] He also developed a method of refining vegetable oil, and established a factory that prepared two tons of refined oil a day. [2] Since the sulfuric acid was not ...
The reaction is accelerated by acid catalysts such as sulfuric acid and certain zeolites. These reactions often proceed via carbocation intermediates as shown for the dehydration of cyclohexanol. [5] Some alcohols are prone to dehydration. 3-Hydroxylcarbonyls, called aldols, release water upon standing at room temperature:
Sugar charcoal is formed by the charring of cane sugar, which was repeatedly recrystallized to remove any organic impurities. [1] It is also prepared by the dehydration of sugar in the presence of concentrated sulfuric acid. Since sulfuric acid is a dehydrating agent, it absorbs water from the sugar and leaves behind black residue of carbon.
Molisch test (using α-napthol) indicating a positive result (see purple ring). Molisch's test is a sensitive chemical test, named after Austrian botanist Hans Molisch, for the presence of carbohydrates, based on the dehydration of the carbohydrate by sulfuric acid or hydrochloric acid to produce an aldehyde, which condenses with two molecules of a phenol (usually α-naphthol, though other ...
Like concentrated sulfuric acid, oleum is such a strong dehydrating agent that if poured onto powdered glucose, or virtually any other sugar, it will draw the hydrogen elements of water out of the sugar in an exothermic reaction, leaving a residue of nearly pure carbon as a solid. This carbon expands outward, hardening as a solid black ...