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๐งด
๐งช Chemistry
Acids, Bases & pH
pH scale from 0โ14 measures acidity; vital for chemistry, biology, medicine and everyday life
Denmark ๐ 1909 Chemistry
Key Facts
- 1
pH scale: 0 (strong acid) โ 7 (neutral) โ 14 (strong alkali); each unit is 10ร change in [Hโบ]
- 2
Acids donate Hโบ ions (HCl, HโSOโ, vinegar pH 3); bases accept Hโบ (NaOH, ammonia, blood pH 7.4)
- 3
Neutralisation: acid + base โ salt + water; e.g. HCl + NaOH โ NaCl + HโO
๐ฌ Did you know? Human blood must be kept between pH 7.35โ7.45; a drop below 7.0 (acidosis) or above 7.8 (alkalosis) can be fatal
Quick Reference
Category
Chemistry
Country
๐ Denmark
Year / Era
1909
About
pH scale from 0โ14 measures acidity