Common pH Values
| Product | pH |
| | 0 |
| HCl in stomach acid | 1 |
| Lemon juice, vinegar | 2-3 |
| Orange juice | 3-4 |
| Acid rain | 4 |
| Black coffee | 5 |
| Urine, salvia | 6 |
| Pure water | 7 |
| Sea water | 8 |
| Baking soda | 9 |
| Ammonia solution | 10-11 |
| Soapy water | 12 |
| Bleach | 13 |
| Oven cleaner | 13-14 |
| Drain cleaner | 14 |
