Which of the 0.10 M aqueous solutions has the lowest pH? Explain. A. KCN, Ka of HCN = 4.0×10−10
C. NaC2H3O2, Ka of HC2H3O2 = 1.8×10−5 E. NaCHO2, Ka of HCHO = 1.8×10−4
B. NH4Br, Kb of NH3 = 1.8×10−5 D. NaClO, Ka of HClO = 3.2×10−8