Values of Kw as a function of temperature are as follows:
Temp (oC) Kw
0 ................. 1.14 × 10-15
25 ............... 1.00 × 10-14
35 ............... 2.09 × 10-14
40 ............... 2.92 × 10-14
50 ............... 5.47 × 10-14
a. Is the autoionization of water exothermic or endothermic?
b. What is the pH of pure water at 50. oC?
c. From a plot of ln(Kw) versus 1/T (using the Kelvin scale), estimate Kw at 37oC, normal physiological temperature.