2007-02-09 15:50:40 · 4 answers · asked by JW 2 in Science & Mathematics ➔ Chemistry
The water is pure (no CO2). And I think the question is getting at how Keq is changed.
2007-02-09 15:56:31 · update #1
It drives off residual CO2 in solution, and that can effect the acid concentration slightly.
2007-02-09 15:54:50 · answer #1 · answered by Anonymous · 0⤊ 1⤋
In water this reaction is constantly going on 2H20 <-> H3O+ + OH-. It is an endothermic reaction and at equilibrium there is only a small amount of H3O+ and OH- present. Heating the water will provide more energy to break H20 up into ions, so it would increase the H30+ concentration.
2007-02-10 00:01:47 · answer #2 · answered by xit_vono 2 · 0⤊ 0⤋
Since H2O ---> H+ + OH- is endothermic, rasing the temperature will encourage this reaction to go to the right. Hot water will therefore contain more H+ and OH- ions than cold water, and, although by definition it will still be neutral ([H+] = {OH-]) the pH will start to fall. Boiling water has a pH of 6 (point something) but it is still neutral.
2007-02-10 03:35:54 · answer #3 · answered by Gervald F 7 · 0⤊ 0⤋
Neutral on the acid-base scale is by definition as low as you can go in concentration of acid without adding base.
So heating is not going to lower the amount of acid in the water any.
2007-02-09 23:53:40 · answer #4 · answered by special-chemical-x 6 · 0⤊ 1⤋