Chapter 14, Problem 47E

Values of K_w as a function of temperature are as follows:

Temperature(°C)	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. Calculate [H⁺] and [OH⁻] in a neutral solution at 50.°C.