[jubba]

Does heating water to say 50 degrees celciuc make it more acidic or more basic?

I think its neutral as equal amount of hydronium and hydroxide ions will be created.
Can anyone verify or reject this?  :robots:

[jubba]

anybody :1eye:

[Borek]

Does heating water to say 50 degrees celciuc make it more acidic or more basic?

Depends on how do you define neutral. If H⁺ = OH^- then you are right. If pH=7.00 then you are wrong - Kw value is slightly higher in higher temperatures.

[jubba]

the definition was H+=OH-

[Borek]

the definition was H+=OH-

So all you have to take into account is the stoichiometry of the water dissociation reaction. Can it produce different amounts of H⁺ and OH^-?

[Mitch]

Kw is a function of temperature, that is my hint.

[Donaldson Tan]

Kw is no longer 10^-14 at 50C. It will be a much bigger value because there is greater extent of dissociation. However, the aqueous system still remains neutral because [H+] = [OH-]

[charco]

Acidity is defined by the concentration of [H+] therefore it becomes more acidic. pH is the accepted measure of acidity and not a balance between H+ and OH- ions. At higher temperatures the water dissociation equilibrium moves in the direction of endothermic change further to the RHS i.e. side of the ions. Kw becomes larger and the solution has a lower pH.