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.
Preoperative care. (Redirected from Pre-op) Preoperative care refers to health care provided before a surgical operation. The aim of preoperative care is to do whatever is right to increase the success of the surgery. At some point before the surgery the health care provider will assess the fitness of the person to have surgery.
A preamp is a âpre amplifierâ and, as the name suggests, it prepares the signal coming from a pickup or microphones for further amplification. It can blend multiple signals into one. Answering the question of whether or not you need a preamp really comes down to the output of your pickup or microphone.