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.
Depending on the nature of your surgery, about a week before hand. Pre-op assessments for day surgery are valid for 6 weeks as long as there's no change in condition, and 4 weeks for in-patient.This is a national guideline. You should already have a date, which the nurse will confirm with you at your pre-assessment.eport Abuse. Depending on the nature of your surgery, about a week before hand. Pre-op assessments for day surgery are valid for 6 weeks as long as there's no change in condition, and 4 weeks for in-patient. This is a national guideline.