#### Answer

a. $pOH = 11.21$: Not basic.
b. $pH = 9.42$: Basic
c. $[OH^-] > [H^+]$: Basic
d. $[OH^-] > 1.0 \times 10^{-7}M$ : Basic

#### Work Step by Step

a. The range for basic in pOH is < 7; Since 11.21 is greater than 7, this isn't a basic solution.
b. The range for basic in pH is > 7; Since 9.24 > 7, this is a basic solution.
c. This is exactly the condition for basic solutions: $[OH^-] > [H^+]$; Basic solution.
d. At $25^{\circ}C$, this is the exactly range for basics solutions: $[OH^-] > 1.0 \times 10^{-7}$: Basic solution.