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.
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.
The normal pH of a stream ranges between 6.5 to 8.5. A pH value that is higher or lower than this range would adversely affect the survival of the aquatic organisms living the stream.
To answer this question we would need to know the type of drain cleaner you are referring to. If you are talking about liquid drain cleaner it has a pH of 14. But the pH ranges from 13 to 14 depending on the type.
The optimum PH of pepsin ranges between 1.0 and 4.0. Pepsin exhibits about 90 percent of the maximum activity and about 35% of the maximum activity.
the pH for close up ranges from 5.5-7
pH 0 < acidic < pH 7 neutral = pH 7 pH 7 < basic < pH 14
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.
11-14
It ranges from 2.4 to 3.4.
It ranges from 6.4 to 7.62.
PBS pH usually ranges between 7.2 and 7.6.
Indicators are substances sensitive to different ranges of pH.
The pH rating of a potato ranges from 5.0 - 5.2 pH. This means a potato, despite neutral in taste is acidic.
Guppies can live in a wide range of pH levels. Generally 5.5 - 8.3 is acceptable.
It ranges between 4.5 and 7.
The pH of acids ranges between 1 to 6. The one with pH 1 is the most concentrated. The pH is a measure of the concentration of H+ ions in a solution.