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pH values of common substances

pH value Acidic solutions pH value Alkaline solutions
1 0.1 N HCl 7.3 Blood (Human)
2.3 Citric acid (Lemons) 7.9 Albumin (eggs)
3 Carbonic acid (soft drinks) 8.5 Sea water
3.5 Tartaric acid (grapes) 10.5 Milk of Magnesia
5.3 Boric acid (eye wash) 11.6 0.1 N Na2CO3 solution
6.6 Lactic acid (milk) 13 0.1 N NaOH solution


Utility of pH values

1) To determine the nature of solution

if pH = 7, then solution is neutral

pH > 7, then solution is alkaline

pH < 7, then solution is acidic

2) To compare the acidity and Basicity of two solutions.

3) For formulating drugs as some drugs are not stable at acidic pH.

4) In agriculture, to determine soil condition.

5) In Medicine pH values of blood and urine for diagnosis of various diseases.

6) In the chemical industry, as certain reactions take place at particular pH only.

7) In bio chemical processes, as enzymes are stable at a particular pH value.

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Index

12.1 - Lowry and Bronsted Concept
12.2 - Conjugate Acid Base Pairs
12.3 - Amphoteric Substance
12.4 - Lewis Acids and Bases
12.5 - Strong and Weak Acids and Bases
12.6 - Dissociation
12.7 - Ostwald's Dilution Law
12.8 - Hydrogen Ion Concentration : pH
12.9 - Polyprotic Acids
12.10 - Salts
12.11 - Methods of Preparation of Salts
12.12 - Properties of Salts

Chapter 13





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