Textbook Problem

. Calculate the [H⁺] in each of the following solutions, and indicate whether the solution is acidic, basic, or neutral.

a. $\left[{\text{OH}}^{-}\right]=7.86\times {10}^{-4}M$b. $\left[{\text{OH}}^{\text{-}}\right]=5.44\times {10}^{-8}M$c. $\left[{\text{OH}}^{\text{-}}\right]=3.19\times {10}^{-3}M$

d. $\left[{\text{OH}}^{\text{-}}\right]=2.51\times {10}^{-9}M$