The forward reaction of this equilibrium is endothermic.

$${{\text{H}}_{\text{2}}}{\text{O(l)}} \rightleftharpoons {{\text{H}}^{\text{ + }}}{\text{(aq)}} + {\text{O}}{{\text{H}}^ - }{\text{(aq)     }} {K_w} = 1.0 \times {10^{ - 14}}{\text{ at 25 }}^\circ {\text{C}}$$

What is correct about water at 50 °C?

A.     ${\text{[}}{{\text{H}}^{\text{ + }}}{\text{]}} > {\text{[O}}{{\text{H}}^ - }{\text{]}}$

B.     ${\text{[}}{{\text{H}}^ + }{\text{]}} < {\text{[O}}{{\text{H}}^ - }{\text{]}}$

C.     ${\text{pH}} < {\text{7.0}}$

D.     ${\text{pH}} = {\text{7.0}}$

C