an extreme at either end of the pH scale is dangerous, but generally between 5.5-8.5 is safe, but really dont go pushing it
A pH of 4
Ph 4 and under and/or pH 8 and over -because Ph7 is the normal Ph level that humans should only take.
Very dangerous. It can cause severe chemical burns. such a low pH is extremely acidic.
Grape juice typically has a pH between 2 and 3. Grape juice with a pH of 1 is unusually acidic, and can be considered dangerous.
pH 14 of course everyone knows that.
The normal pH of blood is 7,35-7,45.
the pH of normal rain is said to be between 5.5 an 5. the pH is not 7 because carbonic acid is contained withing rain droplets from the atmosphere. this is how the atmosphere rids itself of toxins. pH of rain can also become very low when large amount of acid are present (from pollutants) the pH at which fish die in ponds when affected by acid rain is 4.9. SLUM DEE BIC
Between the pH of 1-4.
6.5 pH is too low pH for the blood. It is dangerous. You have got acidosis. The physician will take prompt action. The same pH in the stomach is too high. It is not dangerous. But it may hamper proper digestion of the food.
When the pH level of a substance drops down to 2.5, at that point, the substance is considered to be dangerous. When the pH level of a substance drops down to 2.5, at that point, the substance is considered to be dangerous.
Some acids are not dangerous because they aren't strong acids. The strength of an acid/base is measured on the pH scale. The closer to 7 the weaker. Under 7, is an acid and above 7 is a base. If something has a pH of 1 then it is a dangerous acid, while acid with a pH of 6.5 are not dangerous for example.
This depends on the material and application.