- #1
NihalRi
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Homework Statement
pKw for water at 10 deg Celsius is 14.54. What is the pH of pure water at this temperature?
Homework Equations
kHw = [H+][OH-]
The Attempt at a Solution
I don't even know where to start on this one
NihalRi said:Homework Statement
pKw for water at 10 deg Celsius is 14.54. What is the pH of pure water at this temperature?
Homework Equations
kHw = [H+][OH-]
The Attempt at a Solution
I don't even know where to start on this one
NihalRi said:[H+]^2 = 10^-14.54
SQUARE ROOTING AND THE TAKING THE MINUS OF THE LOG
pH=7.27
The pH can be calculated from pKw using the formula: pH = 14 - pKw.
pH and pKw are inversely related, meaning that as the pH increases, the pKw decreases and vice versa.
The value of pKw at room temperature (25°C) is 14. In other words, at room temperature, the pH of a neutral solution is 7 (pH = 14 - pKw = 14 - 14 = 7).
pKw increases as temperature increases. This means that at higher temperatures, the pH of a neutral solution will be slightly higher than 7.
No, pKw does not provide information about the strength of an acid or base. It is simply a measure of the ionization of water and is constant at a given temperature.