Question

orange juice is a solution that contains citric acid, which gives orange juice an approximate ph of 3.5. which substance is more acidic than orange juice?

a. human saliva with a ph of 6.5

b. battery acid with a ph of 0.8

c. distilled water with a ph of 7.0

d. baking soda solution with a ph of 8.0

Explanation:

To determine which substance is more acidic than orange juice (pH = 3.5), we use the pH scale: lower pH means more acidic (pH < 7 is acidic, pH = 7 is neutral, pH > 7 is basic).

• Option A: Saliva (pH 6.5) is less acidic than 3.5 (6.5 > 3.5).
• Option B: Battery acid (pH 0.8) is less than 3.5 (0.8 < 3.5), so more acidic.
• Option C: Distilled water (pH 7.0) is neutral, less acidic than 3.5.
• Option D: Baking soda (pH 8.0) is basic, less acidic (more basic) than 3.5.

Answer:

B. Battery acid with a pH of 0.8