Does anyone know the meaning of ph?

Answer 1

pH is a measure of the acidity or basicity of a solution.
Solutions with a pH less than seven are considered acidic, while those with a pH greater than seven are considered basic.
pH 7 is defined as neutral because it is the pH of pure water at 25 °C.
pH is formally dependent upon the activity of hydrogen ions but for very pure dilute solutions, the molarity may be used as a substitute with some sacrifice of accuracy.
Because pH is dependent activity, a property which cannot be measured easily or predicted theoretically, it is impossible to give an accurate value for the pH of a solution.
The pH reading of a solution is usually obtained by comparing unknown solutions to those of known pH, although there are other methods.

Answer 2

Hi. Technically the pH is:

-log[H+]

which means that you take the negative of the log (base 10) of the concentration of Hydrogen ions. If you have ever encountered logs, a log (not something made of wood lol) is the power to which 10 is raised to give the value. So log of 10 is 1, because you raise 10 to the first power (10^1)=10. The log of 100 is 2 (10^2=100).

The thing about the concentration of H+ ions is, it is usually a fraction, something like .001. If you take the log of .001 you get
-3. The reason we get a negative in this case is that almost always the concentration of H+ is less than 10. Since in science we like to deal with positive values, we multiply this value by a negative to give us the positive so -(-3)=3. Incidentally, a pH of 3 is considered highy acidic.

The rule of thumb is that any value of pH between 1-7 is acidic, and anything above it is basic. The lower the pH, the more acidic it is.

Also, there is a complementary value called pOH which is calculated similarly as

-log[OH-]

pH+pOH=14, so if you know pH you know pOH and vice versa. With a pH of 3, the pOH is 11. But don't fall prey to the idea that a high pOH, above 7, is basic. A pOH of 3 is very basic, a pOH of 11 is acidic. I know it gets confusing, and that is why scientists just decided to use pH and avoid pOH in most cases.

Therefore, use the following rule:

pH between 1 and 4 is "very acidic"
pH between 5-7 "mildly acidic"
pH of 7 is neutral
pH between 7-10 is "mildly basic"
pH between 11-14 is "highly basic"

Answer 3

are you meaning the PH balance of something, then it mean how much acid or buffers a liquid has

Answer 4

in is the acidic or basic value of a substace it's from 1 to 14

Answer 5

technically its pH (capital h). it means the potential of hydrogen