At 35∘C, the ion-product constant of water is Kw=2.1×10−14. Four separate solutions at this temperature are described below:
A. pH=6.70
B. [H3O+]=1.4×10−7M
C. pOH=7.00
D. [OH−]=5.0×10−8M
Which solution is basic relative to pure water at the same temperature?
a) Solution C
b) Solution D
c) Solution B
d) Solution A