Question

A solution with a hydronium ion concentration of 10^–11 M has a pH of?

A. 3.
B. 7.
C. 11.
D. 4.

Answer 1

@mathmate can u help me?

Answer 2

You would first find the pOH by taking the -log of (10^-11M)

\[pOH = -\log[OH^{-}]\]

then you would subtract that from 14 to find the pH

\[pH+pOH = 14 \]