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Chemistry A Level Question

Stuck on how to answer this question

A student measured the pH of water as 7.0 at 25 degrees. The student then warmed the water to 40 degrees and measured the pH as 6.7.
What do these results tell you about the tendency of water to ionise as it gets warmer? Explain your reasoning in terms of equilibrium.

Reply 1

username1560589

What does an decrease in pH imply about the change in concentration of H+?

Reply 2

SubwayLover1

Thats a tough question but maybe the answer might be do to the fact as the temperature increases you could break up and dissociate the water molecules so the concentration of H+ would increase.
I am not too sure !! :P

Reply 3

tomusaA

Original post by Chenice

The increased heat breaks the bonds in H20 shifting the equalibrium of H+ + 0H- ⇄ H20 to the left, increasing H+ concentration in the solution. pH=-log[H+] hence pH decreases, so the solution becomes more acidic as temperature increases.

Not sure what else could be said to answer the question.