Is pH+pOH=14 only at a temp. near 300 K or at all temperatures?
Dear Student,
At 300K, pH + pOH = 14
This equation can be mathematically represented as:
Kw = [H+] [OH-] , where Kw is the Ionic product of water.
At 300K, Kw = 10-14.. Hence, pH + pOH = 14
With increase in temperature, the concentration of ions in water increases, leading to an increase in Kw. Similarly, with a
decrease in temperature, Kw decreases. The concentration of H+ and OH- ions remains the same, irrespective of the change in temperature, in a neutral solution.
Since pH = -log[H+] and pOH = -log[OH-] , pH + pOH < 14 with increase in the ions at temperatures more than 300K,
and pH + pOH >14 with decrease in ions at temperatures less than 300K.
Regards
At 300K, pH + pOH = 14
This equation can be mathematically represented as:
Kw = [H+] [OH-] , where Kw is the Ionic product of water.
At 300K, Kw = 10-14.. Hence, pH + pOH = 14
With increase in temperature, the concentration of ions in water increases, leading to an increase in Kw. Similarly, with a
decrease in temperature, Kw decreases. The concentration of H+ and OH- ions remains the same, irrespective of the change in temperature, in a neutral solution.
Since pH = -log[H+] and pOH = -log[OH-] , pH + pOH < 14 with increase in the ions at temperatures more than 300K,
and pH + pOH >14 with decrease in ions at temperatures less than 300K.
Regards