help
2007-03-05 16:08:37 · 4 answers · asked by esrarengizbeauty 1 in Science & Mathematics ➔ Chemistry
pH scale is linked the equilbrium constant of water
K = [Products]/[reactants]
Water is a weak electrolyte. It dissociates into...
H2O(l) -><- H+(aq) + OH-(aq)
As the liquids don't effect the equilibrium constant, the equilbrium constant for water
Kw=[H+][OH-] = 1.0x10^-14 at 25 degrees C
In pure water or any neutral solution [H+]=[OH-] = 1.0x10^-7
In acidic solutions the [H+] is greater than 1.0x10^-7 so therefore [OH-] is less than 1,0x10^-7. In basic solutions it is the complete opposite.
We use the equilbribrium constant of water to help find the concentration of H+ and OH- ions in a solution. If we know the [OH-] we can find the [H+]
[H+] = 1.0x10^-14/[OH-]
We then to find the pH of a solution we use the equation
pH= -log[H+]
2007-03-05 17:21:32 · answer #1 · answered by Tigeress 2 · 0⤊ 0⤋
If water dissociates completely you will have a solution containing equal concentrations of H and OH thus giving you a neutral pH of 7
2007-03-06 00:15:55 · answer #2 · answered by Clueless_Lark 2 · 0⤊ 0⤋
Water is 2 hydrogen molecules bound with one oxygen molecule.
pH stands for power of the hydrogen ion.
the more free hydrogen ions ................you figure it out.
2007-03-06 00:15:04 · answer #3 · answered by Suean 2 · 0⤊ 1⤋
Cousins???
2007-03-06 00:15:36 · answer #4 · answered by johN p. aka-Hey you. 7 · 0⤊ 1⤋