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| pH Values of Common Substances |
In science, pH is a scale (from 0-14) used to measure the acidity or basicity of a solution. An acidic solution have lower pH values (less than 7) whereas a basic solution has bigger pH values (greater than 7). At room temperature, pure water has pH value of 7, which means it is neither acidic nor basic in nature. It is neutral.
pH values of common substances
| Substance | pH Value |
|---|
| Sulfuric Acid (H2SO4) | 1.01 |
| Hydrochloric acid (HCl) | 1.08 |
| Nitric acid (HNO3) | 1.08 |
| Gastric juice | 1.20 |
| Arsenic acid | 1.70 |
| Citric Acid (Lemon Juice) | 2.0 |
| Hydrofluoric acid (HF) | 2.12 |
| Isocyanic acid (HOCN) | 2.23 |
| Formic acid, CH2O2 (methanoic acid) | 2.38 |
| Lactic acid, C3H6O3 (milk acid) | 2.44 |
| Acetic acid, C2H4O2 (Vinegar) | 2.88 |
| Apple | 2.9-3.3 |
| Soft Drinks | 3.0 |
| Carbonic acid (H2CO3) | 3.68 |
| Oranges | 3.0-4.0 |
| Wine and Beer | 4.0 |
| Tomatoes | 4.5 |
| Bananas | 4.5-4.7 |
| Black Coffee | 5.0 |
| Milk | 6.5-6.7 |
| Rain Water | 6.5 |
| Saliva | 6.7 |
| Pure Water | 7.0 |
| Common Salt | 7.0 |
| Blood | 7.35-7.45 |
| Tears | 7.4 |
| Egg | 7.8 |
| Baking Soda (Sodium Bicarbonate) | 8.3 |
| Potassium acetate (CH3COOK) | 8.75 |
| Sodium acetate (CH3COONa) | 8.75 |
| Calcium carbonate (CaCO3) | 9.91 |
| Milk of Magnesia | 10.5 |
| Sodium carbonate (soda ash, Na2CO3) | 11.26 |
| Calcium hydroxide (lime, Ca(OH)2) | 12.46 |
| Sodium hydroxide (NaOH) | 12.88 |
| Potassium hydroxide (KOH) | 12.88 |
