pH scale

The pH is a measure of liquid acidity/alkalinity. It ranges from 0 to 14, where 0 is most acidic and 14 is most alkaline. The more acidic, the more hydrogen ions (h+) it contains. (1)Hoehn KN, Marieb EN. Human anatomy & physiology. 8th Edition. 2010. ISBN 0-8053-9591-1. Available here. (3)Advanced BioTech. pH Scale Comparisons. Available here. (2)MedlinePlus. Stomach acid test. Available here.

Examples of pH:
Battery acid = 0.3
Lemon juice = 2.2
Vinegar = 2.8
Gastric (stomach) acid = 1.5-3.6
Orange juice = 4.2
Milk = 6.7
Distilled water = 7 (perfectly neutral)
Blood = 7.4 (4)Merc Manual. Acid-Base Regulation. Available here.
Sea water = 8
Baking soda = 8.4
Ammonia = 11.5
Bleach = 12.6

References   [ + ]

1. Hoehn KN, Marieb EN. Human anatomy & physiology. 8th Edition. 2010. ISBN 0-8053-9591-1. Available here.
2. MedlinePlus. Stomach acid test. Available here.
3. Advanced BioTech. pH Scale Comparisons. Available here.
4. Merc Manual. Acid-Base Regulation. Available here.

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