Chapter 14, Problem 66E

Calculate $\left[{\text{H}}_3{\text{O}}^{+}\right]$ given $\left[{\text{OH}}^{-}\right]$ in each aqueous solution and classify each solution as acidic or basic.

a. $\left[{\text{OH}}^{-}\right]=2.1\times {10}^{-11}\text{M}$

b. $\left[{\text{OH}}^{-}\right]=7.5\times {10}^{-9}\text{M}$

c. $\left[{\text{OH}}^{-}\right]=7.5\times {10}^{-9}\text{M}$

d. $\left[{\text{OH}}^{-}\right]=1.0\times {10}^{-2}\text{M}$