About Alexander Expertise I can answer questions regarding all materials taught up to AP Chemistry and a majority of organic chemistry. This includes elementary, high school, and some college level chemistry. I can answer questions regarding stoichiometry, reactions, gases, thermodynamics, atomic structure and periodicity, bonding, chemical kinetics, acids and bases, spontaneity, entropy, and free energy, electrochemistry, and organic and biological molecules.
I cannot answer advanced organic chemistry questions, or questions involving a high level of physics involved. Other than that, I can answer ultimately any question you have.
Experience PHD in Chemistry from William and Mary college in VA. High school teacher of all level for 30 years.
Organizations Flynn Sciences
Publications Numerous science catalogs, an instructional Lab Kit book for lab procedures.
Chloe wrote at 2008-09-12 23:45:36
The catalyst in question "speeds up" the destruction of collagen, the matrix forming protein in Jell-O. Because of this, when bromelin (the enzyme in pineapple) is present, the Jell-O cannot properly form. It is only when the bromelin has been "destroyed" by heating the pineapple that your Jell-O can properly solidify.
Alex said most of this already, but I hope that my answer cleared up any remaining confusion you might have.
