A Solution Of Benzoic Acid (c6h5cooh) That Is 0.20 M Has A Ph Of 2.45. What Is Ka For Benzoic Acid? Lisa Nguyen December 9, 2022 Posted in Featured Share: Author: Lisa NguyenLisa Nguyen is a writer and editorial contributor at ultimateteamtrading.net, covering news and features across the site. Lisa focuses on clear, reader-friendly reporting.