Final answer:
To determine Kb for the weak base, calculate the pOH using the pH value and use it to find the hydroxide ion concentration. Then, use the hydroxide ion concentration to calculate Kb.
Step-by-step explanation:
To determine the Kb for the weak base, we need to calculate the pOH first using the pH value. The pOH can be found using the formula pOH = 14 - pH. In this case, the pOH is 14 - 10.95 = 3.05. Then, we can calculate the hydroxide ion concentration using the formula [OH-] = 10^-pOH. Therefore, [OH-] = 10^-3.05. Finally, we can calculate Kb using the equation Kb = Kw / [OH-], where Kw is the ion product of water and has a value of 1.0 x 10^-14 mol^2/L^2.