Make sure the cup has enough vinegar in it to cover the object. The pH scale goes from 0 (extremely acidic) to 15 (extremely basic). Water is neutral at 7. [2] X Trustworthy Source Science Buddies Expert-sourced database of science projects, explanations, and educational material Go to source The acidity of stomach acid is usually in the range of 1 to 3 on the pH scale. It can decrease in acidity as food enters the stomach. [3] X Research source Similarly, vinegar has a pH of about 2. 8. [4] X Research source
Lime juice is on par with lemon juice, at about 2 on the pH scale. [6] X Research source
Grapefruit juice is on a similar level to orange juice and can also be used; the canned version is slightly more acidic. [8] X Research source
Take notes about the process, such as how long it takes, what you observe, and the conditions of the experiment, such as the room temperature and how much acid you used. [10] X Research source
While using water doesn’t simulate stomach acid, most foods will break up in water eventually, especially bread or crackers. You also may want to wear latex gloves for this experiment, as well as put down newspaper or paper towels.
