NH3 and CH3NH2 have Kb values of 1.8 x 10-5 and 5.0 x 10-4, respectively; which of the following statement(s) is (are) CORRECT?

Question

NH3 and CH3NH2 have Kb values of 1.8 x 10-5 and 5.0 x 10-4, respectively; which of the following statement(s) is (are) CORRECT?

(i) CH3NH2 is a stronger base than NH3.
(ii) the conjugate acid of CH3NH2 is a stronger acid than the conjugate acid of NH3.
(iii) 0.1 M aqueous solutions of CH3NH2 and NH3 have the same concentration of hydroxide ion, OH-.

i know i is true, but am not sure of the others

Answer 1

NH3 and CH3NH2 have Kb values of 1.8 x 10-5 and 5.0 x 10-4, respectively; which of the following statement(s) is (are) CORRECT?

Please title chemistry question so physicist does not have to figure it out.