By definition a neutral solution has pH or pOH of 7, and pH + pOH= 14.
The reason for pH maxing out at 14 is easiest to explain by examining what happens at low or negative pH values. Looking at what would go on at a pH of <0 to generate a pOH of >14. It is possible to calculate solutions which meet this criteria , but do they really exist?
Any acid that yields a concentration of hydrogen ions with a molarity greater than 1 will be calculated to have a negative pH. Any glass pH electrodes dipped in such a solution would exhibit 'acid error' which causes them to measure a higher pH than the real pH.
Another technical problem is that strong acids do not fully dissociate at high concentrations. Using HCl as an example some of the hydrogen would remain bound to the chlorine so the true pH would be higher than the calculated pH
Even the definition of how we calculate pH starts to fall apart. Normally pH isis calculated as -log [H+] (negative of the logarithm of the hydrogen ion molarity). This would have to be corrected to be pH = - log aH+ (negative pf the logarithm of the hydrogen ion activity) for reasons that dont need to be covered here.
The highest pH on the scale is 14. But pH over 14 is also possible: for example a sample of 1o M sodium hydroxide solution has a pH of 15.
pH can most definitely go above 14. pH stands for negative logarithm of Hydrogen concetration and of course a solution could surpass 14Ph....
We can subtract pOH from 14, using the formula pH + pOH = 14. This is only true at 14 degrees Celsius.
The highest number on the pH scale is 14. The pH scale goes from 0 to 14.
A strong acid always has a pH much lower than 14.
14
more than 7.0
Alkalines, or bases, have a pH greater than 7 (maximum is 14).
pH scale is from 1 to 14 (not 15)
This is only a convention.
The highest pH on the scale is 14. But pH over 14 is also possible: for example a sample of 1o M sodium hydroxide solution has a pH of 15.
pH can most definitely go above 14. pH stands for negative logarithm of Hydrogen concetration and of course a solution could surpass 14Ph....
Practically pH of 14 or 15 is the highest base value reachable, due to limits of max. concentration.
Technically, the pH range is 0 to 14. 0 to 7 is acidic, 7 is neutral, and 7 to 14 is basic. However, in very rare situations, an acid can have a pH of -1 and a base can have a pH of 15. But I doubt you need to know that.
Practically pH of 14 or 15 is the highest base value reachable, due to limits of max. concentration.
The answer to this question is 14 (I believe!). This is the PH Scale: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 All these All these numbers from numbers from 7 - 14 are alkalis. 1 - 7 are acids. The middle of the PH Scale is 7; what we call Neutral (this is because it is neither Acid or Alkalis). I hope this answer helps you.
pOH = 14 - pH 5 = 14 - pH 9 = pH