Alkaline water will not neutralize the acid in the stomach. Alkaline water has a pH of 7.5 to 10, and acid in the stomach has a pH of 4. Acidity of stomach is 1/100, and alkalinity of alkaline water is 1/1,000,000. Obviously, stomach acid is over 1,000 times more concentrated than alkaline water. In order to neutralize 3 liters of stomach acid that is produced in a day, you have to drink 3,000 liters of alkaline water.