In English, natron means a mixture of sodium carbonate decahydrate Na₂CO₃.10H₂O with sodium hydrogen carbonate NaHCO₃, or just sodium carbonate decahydrate alone. Put some baking powder (not just baking soda) into water and watch it fizz! (Effervesce is the technical term.) Washing soda is not calcium carbonate CaCO₃ (that's limestone) but sodium carbonate Na₂CO₃. NaHCO₃ + KCOO(CHOH)₂COOH -> KCOO(CHOH)₂COONa + CO₂ + H₂O You can do this at home.
When the baking soda reacts with the cream of tartar it produces carbon dioxide, water and potassium sodium tartrate.
For this reason, baking powder also contains a drying agent, e.g. Cream of tartar still has one of two carboxylic acid -COOH groups, and it will react with the baking soda as soon as it gets wet, it doesn't need to be heated. This is frequently 'cream of tartar', KCOO(CHOH)₂COOH, an acidic potassium salt of tartaric acid COOH(CHOH)₂COOH rather than tartaric acid itself. Baking powder, as escoville said, is a mixture containing baking soda and an acid. Re #3, to get the chemistry straight: Baking soda is sodium hydrogen carbonate, Natriumhydrogencarbonat, NaHCO₃, otherwise known as sodium bicarbonate, bicarbonate of soda, or in German, apparently, Natron.
0 kommentar(er)
