Chemistry, 05.11.2020 01:00 miami158999

Please help me asap! and please explain. 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

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Please help me asap! and please explain. Which of the 0.10 M aqueous solutions has the lowest pH? E...