In what pH range does highly acidic citrus juice, such as kaffir lime juice, typically hover?
Answer
2.0 to 3.0
Kaffir lime juice, similar to other highly acidic citrus fruits, maintains a pH level significantly below the neutral marker of pH 7.0. The typical range cited for these concentrated fruit juices is between 2.0 and 3.0. This extremely low pH level is the quantitative measure of the acidity driven by the citric acid content. Understanding this low value is critical because it directly correlates with the potential for damage, specifically the chemical erosion of tooth enamel and the possibility of causing gastrointestinal distress by introducing a significant acid load into the digestive system.

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