pH values of some common substances
| Substance | pH | Type |
|---|---|---|
| Hydrochloric Acid (HCl) | 0.0 | Acid |
| Battery Acid (H2SO4 sulfuric acid) | 1.0 | Acid |
| Gastric juice | 1.2 | Acid |
| lemon juice | 2.2 | Acid |
| Vinegar | 2.8 | Acid |
| Apples | 3.0 | Acid |
| Soft drinks | 3.0 | Acid |
| Wine and Beer | 4.0 | Acid |
| Tomatoes | 4.5 | Acid |
| Black coffee | 5.0 | Acid |
| Human saliva | 6.4 | Acid |
| Rain water | 6.5 | Acid |
| Milk | 6.8 | Acid |
| Pure water | 7.0 | Neutral |
| Human Blood | 7.4 | Base |
| Tears | 7.4 | Base |
| Egg | 7.8 | Base |
| Baking Soda (Sodium Bicarbonate) | 8.3 | Base |
| Milk of Magnesia | 10.5 | Base |
| Ammonia | 11.0 | Base |
| Lime (Calcium Hydroxide) | 12.4 | Base |
| Sodium Hydroxide (NaOH) | 14.0 | Base |
| Oven cleaner | 13.8 | Base |