AP BIOLOGY

Detailed explanation-1: -The blood in your veins is slightly alkaline (pH = 7.4). The environment in your stomach is highly acidic (pH = 1 to 2). Orange juice is mildly acidic (pH = approximately 3.5), whereas baking soda is basic (pH = 9.0).

Detailed explanation-2: -A pH of 7 is neutral, a pH less than 7 is acidic, and a pH greater than 7 is basic. Each whole pH value below 7 is 10 times more acidic than the next higher value, meaning that the concentration of hydrogen ions is 10 times as great.

Detailed explanation-3: -Among the three fruit juices compared, grape juice was found to be more acidic with a pH of 2.22–2.81 compared to the pH of orange juice (2.48–3.06) and pineapple juice (2.51–3.91).

Detailed explanation-4: -Fruit Juice pH Levels Apples, oranges, grapes and cranberries are all moderately acidic. Cranberry juice is the most acidic, with an approximate pH value of 2.3 to 2.5. Grape juice has a pH of 3.3; apple juice has an approximate pH value of between 3.35 and 4; the pH of orange juice ranges from 3.3 to 4.2.