Ritchie Valens. Richard Steven Valenzuela (May 13, 1941 â February 3, 1959), known as Ritchie Valens, was an American singer, songwriter, and guitarist. A rock & roll pioneer and a forefather of the Chicano rock movement, Valens' recording career lasted eight months, as it abruptly ended when he died in a plane crash.
Why do enzymes in our stomach work best at a pH of 7? Actually the pH of the stomach very acid relative to pH 7 (between pH 1-4). An acidic stomach is optimal for the breaking of hydrogen bonds that makes up the complex compoundsâ¦ in the food we ingest, like proteins.
Every enzyme works at a certain pH. The only exception is papain, which works at a wide range of pH. Pepsin works best at pH 1-2. In fact, pepsin is inactivated at neutral pH. HCl concentration 0.1 N gives pH 1, 0.01 N gives pH 2, because pH = -log [H+]. The higher the H+ concentration, the lower the pH.