In my gr 11 Chem class we had to make a cake and now we're talking about chemical components of baking powder and how they react as leavening agents. I'm having problems answering the question: "Baking powder is made up of three main components: baking soda, a dry acid, and a filler. Give the chemical name, the chemical formula, and the function of each component." I have found/determined the answers for the baking soda and somewhat for the dry acid, but I'm having trouble with the cornstarch (which is what is usually used as the filler). I know that it is used so that the reaction doesn't occur prematurely, as for the chemical name and formula, well, I'm afraid I don't know and I haven't been able to uncover it on my own.