chem101

The pKb of ammonia, NH3, is 4.74 at 25°C. Which of the following is the Ka of the ammonium ion, NH4+? not sure what to do, this is what i have i guess: kb = -log 4.74 ----- pKa + pKb = 14 pKa = 9.26 ka = -log 4.26 = -0.676 ----- Ka = [NH4+][OH-]/ [NH3]

thank you silly of me and to think i spent so long on that on a silly error.

thank you :)