NaOH + Na2HPO4 --> Na3PO4 + H2O (aka tribasic sodium phosphate) Of course, once all the hydrogen is consumed there is no further reaction with sodium hydroxide. In general, adding sodium hydroxide to a solution of any of the sodium phosphates will change the pH.
Pre-operative adjective Referring to the logistics of preparing for a surgical procedure/operation. See Pre-op time noun. 1. A popular term for all forms of careâeg, medication provided to a Pt prior to a surgical intervention.
a JustAnswer user. Pre' means before and' Pyloric' is the name of the valve on top of stomach. The pyloric valve functions as a trapdoor to keep food and gastric juices in the stomach. The esophagus (and mouth, which is part of the GI Tract) would be Pre-Pyloric. That's the definition. As to what it is referring to in YOUR case, I'm not 100% clear without additional information.