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Toy submarine powered by baking powder. A baking powder submarine is a plastic toy submarine that dives and surfaces with the addition of baking powder. Baking powder submarines are sometimes misidentified as "baking soda submarines"; however, baking soda alone dissolves but does not react when placed in water.
A column of porous black graphite formed during the experiment. Carbon snake experiment. 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]
Baking powder is a dry chemical leavening agent, a mixture of a carbonate or bicarbonate and a weak acid. The base and acid are prevented from reacting prematurely by the inclusion of a buffer such as cornstarch. Baking powder is used to increase the volume and lighten the texture of baked goods.
The indicator is used in photosynthesis and respiration experiments to find out whether carbon dioxide is being liberated. [1] It is also used to test the carbon dioxide content during gaseous exchange of organisms. When the carbon dioxide content is higher than 0.04%, the initial red colour changes to yellow as the pH becomes more acidic.
Vinegar is known as an effective cleaner of stainless steel and glass. Malt vinegar sprinkled onto crumpled newspaper is a traditional, and still-popular, method of cleaning grease-smeared windows and mirrors in the United Kingdom. [53] Vinegar can be used for polishing copper, brass, bronze or silver.
Vinegar eels are often given to fry (baby fish) as a live food, like microworms. [ 1 ] [ 3 ] Although they are harmless and non- parasitic , leaving eels in vinegar is considered objectionable (for example, in the United States they are not permitted in vinegar destined for American consumers). [ 4 ]
The Vinegar Tasters (三酸圖; 'three sours'; 嘗醋翁; 'vinegar-tasting old men'; 嘗醋圖, 尝醋图) is a traditional [clarification needed] subject in Chinese painting, which later spread to other East Asian countries. The allegorical image represents three elderly men tasting vinegar. The identity of the three men varies.
[1] [2] Chemical substances may take the form of a single element or chemical compounds. If two or more chemical substances can be combined without reacting, they may form a chemical mixture. [3] If a mixture is separated to isolate one chemical substance to a desired degree, the resulting substance is said to be chemically pure. [4]