Answer
a. $H_2O$
b. $H_2O$
c. $OC_6H_5^-$
Work Step by Step
a. $H_2O$ has a greater $K_b$ value. Therefore, $H_2O$ is a stronger base.
b. $H_2O$ has a greater $K_b$ value. Therefore $H_2O$ is a stronger base.
c. $OC_6H_5^-$ has a greater $K_b$ value. Therefore, $OC_6H_5^-$ is a stronger base.