pH值和溫度有何關係

pH value 可以同溫度有關...
Please looking below acid equilibrium system：
HA (aq) + H2O (l) ↔ A─ + H3O+ △H is positive value
HA is a strong acid
A─ is anion
H3O+ is hydroxonium ions
△H is enthalpy change (energy change)

The forward reaction is enothermic(吸熱的) reaction,
When temperature increases, the equilibrium position will shifts to right to form more A─ and H3O+ ions. Because the forward reaction is energetically(能學) favourable at higher temperature.
So, the concentration of H3O+ will increases when the temperature increases.
Thus, the pH value will decreases when more H3O+ is formed

相反來說,
The temperature decreases, the forward reaction is not favourabe and the concentration of H3O+ will decreases.
Therefore, the pH value increases when less H3O+ is formed.

總括黎講...
只要一個酸鹼反應係涉及一個dynamic equilibrium, pH 值 就會同溫度掛拘.

I hope my answer can help you.

PS：本人英文唔好，所以會中英夾離，睇得辛苦就唔好意思^.^"

基本上冇關係...
pH係計酸鹼度,用1-14黎分,1係最酸,14係最鹼...多數會用pH paper,pH metre黎量度,pH metre多數用黎度d有顏色ge液體ge酸鹼度 就算佢係熱定凍都唔會影響到佢ge pH值的
溫度可用溫度計黎量度,溫度計都有好多種,中4physics有教,多數用攝氏C,華氏F,仲有K,呢個係攝氏ge溫度加273度