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Baking_Powder
2013-11-13 来源: 类别: 更多范文
Baking Powder
Baking powder is a fine white powder used for making cakes, biscuits, and it is also used in toothpaste (World Book, 1968). Baking powder is normally made up of three different parts: an acid, a base and a filler of some sort. The uses of baking powder are numerous. The key to baking powder is its release of carbon dioxide (www.howstuffworks.com). Baking powder has had a long-term mystique in toothpastes, there are varying opinions as to its effectiveness (dentistry.about.com).
Baking powder is a mixture: an acid, such as cream of tartar, a base, such as baking soda, and a filler, such as corn starch. The baking soda is also known as sodium bicarbonate, with the chemical formula NaHCO3. Cream of tartar, also known as tartrate salt, has the formula KHC4H4O6. The reaction is
NaHCo3 + KHC4H4O6 à KnaC4H4O6 +H2O + CO2
Some baking powders also contain sodium
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