The pH of stomach is acidic, the pH of the small intestine is neutral.
So how does the body make adjustments in pH when food moves from the stomach to the small intestine?
there is fluid in your duodenum ( the organ that attaches your stomach to small intestine). The fluid is basic and neutralizes all of the digestive acids.
The pancreas secretes bicarbonate to raise the pH in the small intestine. Pancreatic enzymes and other enzymes in the small intestine need a neutral pH to function properly.
Best wishes and good luck.