Question
Download Solution PDFWhich of the following has the lowest pH value?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFKey Points
- Gastric juice has a highly acidic pH ranging between 1.5 and 3.5 due to the presence of hydrochloric acid (HCl).
- The acidic environment of gastric juice is essential for digestion, particularly for breaking down proteins into smaller peptides.
- It activates the enzyme pepsin, which is crucial for protein digestion.
- The low pH also acts as a defense mechanism, killing many bacteria and pathogens ingested with food.
Additional Information
- Blood: Blood has a slightly alkaline pH ranging from 7.35 to 7.45. This is essential for maintaining homeostasis and proper physiological function.
- Pure Water: Pure water has a neutral pH of 7 at 25°C. It is neither acidic nor basic and serves as a reference point for the pH scale.
- Sodium Hydroxide Solution: Sodium hydroxide (NaOH) is a strong base and has a very high pH, usually above 12. It is commonly used in industrial processes and laboratory settings.
- pH Scale: The pH scale measures the acidity or alkalinity of a solution, ranging from 0 (most acidic) to 14 (most basic). A pH of 7 is neutral..
Last updated on Jul 11, 2025
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