pH for some common solutions
| Solutions | pH |
|---|---|
| Blood | 7.3 – 7.5 |
| Saliva | 6.5 – 7.5 |
| Urine | 5.5 – 7.5 |
| Coffee | 4.5 – 5.5 |
| Tomato juice | 4.0 – 4.4 |
| Vinegar | 2.4 – 3.4 |
| Lemon juice | 2.2 – 2.4 |
| Gastric juice | 1.0 – 3.0 |
| Soft drinks | 3 |
| Milk | 6.5 |
| Sea water | 8.5 |
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