Re: how does buffering in saliva work & what is a normal pH of saliva?

Hello Jenny,
Okay lets start from the pH of saliva, the freshly secreted salive is 
slightly acidic having a pH range of 6.4 to 6.9. in the mouth saliva 
looses CO2 and becomes alkaline. An alkaline pH of saliva favors the 
deposition of tartar, which is calcium carbonate, on the teeth or even the 
formation of calculus.

And saliva’s pH has been changed by eating different food, like first of 
all saliva’s digestive enzymes releases which try to digest the food, and 
secondly there is food’s own pH really does matter. For example if you are 
having coke, its pH is highly acidic so it changes ones oral pH as well, 
resulting in same oral problems mentioned above.

In extensions you can add components of saliva, its daily volume (20 ml 
per hour, but greatly increased at meal times), specific gravity and its 
functions.

BEST OF LUCK WITH YOUR PROJECT JENNY.
Tak care 
sHiBBi