pH ranges from 1 (acid) to 14 (base). As far as acceptble range, you need to make clearer what else you need to know...like pH range of blood.
You will have to add an alkaline substance in order to get the kiddie pools water back to an acceptable PH level. Calcium carbonate would work to increase the PH.
There is no value of 11 on the pH scale. The pH scale ranges from 0 to 14, with 7 being neutral. A pH of 11 would be considered alkaline or basic.
The pH of normal rainfall ranges from 5.0 to 5.6, making it slightly acidic due to the presence of carbon dioxide in the atmosphere.
A solution with a pH of 7.0 is considered neutral, meaning it is neither acidic nor basic. If the pH ranges from 7.0 to 100, it indicates increasingly alkaline conditions, with higher values reflecting a lower concentration of hydrogen ions. However, a pH of 100 is not typically encountered in standard aqueous solutions, as the pH scale generally ranges from 0 to 14 under normal conditions.
Many plants are tolerant of wide ranges of pH but many are very specific in their pH requirements. A good example is the blueberry which will only grow in a pH below 5.
Between pH 4.0 to 4.6.
You will have to add an alkaline substance in order to get the kiddie pools water back to an acceptable PH level. Calcium carbonate would work to increase the PH.
the pH for close up ranges from 5.5-7
The pH of Pepsi typically ranges from 2.5 to 2.9, making it acidic.
Guppies can live in a wide range of pH levels. Generally 5.5 - 8.3 is acceptable.
11-14
It ranges from 2.4 to 3.4.
The pH of vinegar typically ranges from 2 to 3, making it acidic.
Indicators are substances sensitive to different ranges of pH.
The pH of rhubarb typically ranges from 3.1 to 3.4, making it acidic in nature.
The pH level of tomatoes typically ranges from 4.3 to 4.9, making them moderately acidic.
The pH of garlic typically ranges from 5.3 to 6.0, making it slightly acidic.