Question

Acid: Pka:
H20 15.7
NH3 38
HCL -8
NH4+ 9.2

Given the list of pKa values, which acid will have the largest amount of conjugate base present in the solution at equilibrium?

H2O

NH3

NH4+

HCl

Answer 1

Convert those pKa values to Ka, then write the ionizaton equation, write the Ka expression and see which has the largest base value.

Answer 2

Thanks! So the answer is HCl, right?

Answer 3

right