Asked in Elements and Compounds
Elements and Compounds
What is the pH number of sodium hydroxide?
Answer

Wiki User
July 03, 2010 2:33AM
Sodium hydroxide does not have a pH number. The pH of a solution of sodium hydroxide depends entirely on the concentration of it in that solution.
To learn how to determine the pH of a sodium hydroxide solution, see the Related Questions links.
Related Questions
Asked in pH Levels
What is sodium hydroxide pH level?

pH level is a measure of acidity, the simplest way to
understand it is the lower the pH value the more acid something
is, and the higher the pH value the more alkali something
is. Finaly a value of pH 7 is neutral (neither acid or
alkali).
pH does not show the amount of Sodium Hydroxide present,
however the pH would increase if Sodium Hydroxide was added because
Sodium Hydroxide is alkali.
The pH of concentrated (1 M) Sodium Hydroxide is 14.
Asked in Acids and Bases
What is pH of sodium hydroxide solution?

We cannot tell you the pH without knowing the
concentration.
Sodium hydroxide is a strong base, so the pOH will be the same
as the negative log of the molar concentration of sodium hydroxide.
Since the pH is 14 - pOH, you can calculate the pH by subtracting
the log of the sodium hydroxide concentration (in molar units) from
14. A 1 M solution of sodium hydroxide will have a pH of 14; a 0.1
M solution will have a pH of 13, and so on. This breaks down at
very high concentrations; above 1 M the pH doesn't change much.