Guest

The pH of water at 25° C is 7. When it is heated to 100° C. The pH of water options increases remains same decreases decreases then increases

The pH of water at 25° C is 7. When it is heated to 100° C. The pH of water
options
increases
remains same
decreases
decreases then  increases

Grade:12th pass

1 Answers

Arun
25757 Points
3 years ago
Dissociation of water is temperature dependent H2O ⇋ H+ + OH– Dissociation constant = Kw = [OH–] [H+] Water at 100°C will have more of the molecules dissociated to ions then at 25°C i.e., Kw increase with increase in temperature. ∴ pH of water decreases on increasing temperature.  At 100°C pH of water becomes 6.14
 
hence option C iw correct

Think You Can Provide A Better Answer ?