Your body relies on a series of buffer systems to keep you well, and your saliva maintains a certain pH to keep your mouth from becoming acidic. To the best of my knowledge a dry mouth would be more prone to burning then one that is producing saliva appropriately.
Someone else may have better information re your questions.
Moderator: Anxiety, Osteoarthritis,
GERD/Heartburn and Heart/Cardiovascular Disease.
"Life is not about waiting for the storms to pass...
It's about learning how to dance in the rain."~ Vivian Greene