Restorative & Materials · single question
A patient is drinking soda. What is the most common (approximate) pH?
Show answer and explanation
Correct answer: B. 4.5
- A. Many colas are around 2.5; this is on the low end and is a strong distractor.
- B. Keyed answer. As a general 'soft drink' figure many exams cite ~4–4.5; either way it is well below the critical pH (~5.5) for enamel demineralization.
- C. 6.5 is near neutral — too high for a carbonated soft drink.
- D. 8.0 is alkaline — wrong for an acidic beverage.
Note: Real colas run closer to 2.5; this item's keyed answer is 4.5. The teaching point is that soda is acidic (below the ~5.5 critical pH).
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