If the PK_w for Water At $65 ^ { \circ } \mathrm { C }$

Multiple Choice

If the pK_w for water at $65 ^ { \circ } \mathrm { C }$ is 10.4, the K_w at the same temperature is _____.

A) 3.26 × 10^-13
B) 6.83 × 10^-11
C) 3.97 × 10^-13
D) 4.00 × 10^-11
E) 8.82 × 10^-12