[aeacfm]

we were disscusing dissociation of materials and i said that Kd of water is different from Kw of it but every body told me that they are the same
is they are the same or different ?

[Borek]

Write both reactions and both constant definitions.

[aeacfm]

H2O ::equil::H⁺+OH^-
Kd = [H+][OH-]/{H2O]
where Kw = Kd*[H2O]
 isnt that right

[aeacfm]

take in account that i didnot write the hydration H3O+ as water her as water is general solvent

[Borek]

In general you are right, just remember that concentration of water is assumed to be constant and as such included in Kw value.

http://www.chembuddy.com/?left=pH-calculation&right=water-ion-product

[aeacfm]

the concentration of water @ STP i think 55.55 N isnt it ?

[aeacfm]

so i find the Kd of water is 1.8 x10 ^-16

[Abdul]

we were disscusing dissociation of materials and i said that Kd of water is different from Kw of it but every body told me that they are the same
is they are the same or different ?