Chapter 14, Problem 64E

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

a. $\left[{\text{H}}_3{\text{O}}^{+}\right]=1.3\times {10}^{-3}\text{M}$

b. $\left[{\text{H}}_3{\text{O}}^{+}\right]=9.1\times {10}^{-12}\text{M}$

c. $\left[{\text{H}}_3{\text{O}}^{+}\right]=5.2\times {10}^{-4}\text{M}$

d. $\left[{\text{H}}_3{\text{O}}^{+}\right]=6.1\times {10}^{-9}\text{M}$