How does the pH of water change with temperature? Why does pH change with temperature?

At normal temperature (25 degrees Celsius), the ion product of water is 10^(-14). That is: Amount concentration of H ions (unit mol/L) * The concentration of OH ions (unit mol/L) = 10^(-14) Of course, water is composed of H ions and OH ions, so their concentrations are the same. From this, it can be concluded that the ion concentration is 10^(-7)mol/L, then pH=-log (hydrogen ion concentration) = 7. However, the neutralization reaction between H ions and OH ions (note that the neutralization reaction is actually a reversible reaction, but the degree of reverse reaction is small) is an exothermic reaction. Therefore, as the temperature increases, the reaction advances in the opposite direction, and the concentration of H ions increases. The ionic product constant of 100-degree water is about 10^(-12). From this, a pH value of about 6 can be obtained. In the same way, the ion product of water at 0 degrees Celsius is about 10^(-16), and the pH value is about 8. However, in both environments, water is still neutral! Because the ionic product constant also changes. Therefore, the neutral constant will also change (100 degrees is 6, 0 degrees is 8).