Some time ago, in an article entitled "How to make ... in warm water; a piece of litmus paper reddened by acid is then placed in the soda ash, and it instantly becomes blue from the alkaline ...
Due to its alkaline pH, baking soda can neutralize acids, making it popular for heartburn ... dissolve one-half teaspoon in at least one-half cup of water. OTC antacids containing baking soda ...