1no..
it depend on temperature.. obviously.
The ionisation constant of water is [H+][OH-]. Does this mean that whatever concentration os water we take, it will dissossiate into 10 -7 moles of H+ per litre and 10-7 moles of OH- per litre?
-
UP 0 DOWN 0 0 4
4 Answers
1It's definitely temperature dependent.
H2O → H+ + OH- . backward arrow is there .
K = [H+][OH-] / [H2O] . as the eqm constant is temp dependent . obviuosly K.[H2O] = Kw = [H+][OH-] is also . you are multiplying K by a constant that's all . so , [H+][OH-] also vaies with temp.
62i guess the question is not about temparature.!! But still ends up being temparature dependent!
The question asks about Kw based on concentration.
Kw should ideally not be dependent on concentration
having said that, concentration changes only on temparature... cos it is fixed at every temperature!!!
Thus, The whole question sort of falls!
For conc to change, temp should change..
as soon as temp changes, Kw changes!
62i am saying that it will be the same if they are at same condition... how can the density of water change!! i mean it has a fixed density..
So it has the fixed no of moles at same conditions
Do u realise what u mean? u mean that u could somehow put double the number of water molecules in the same volume of beaker!
Water is not salt or acid that u could dissolve in water.. i mean the quantity of acid/ base / salt is very small and they dont generally take volutme.. they just mix in water... but how can u pour more water without increasing volume!