A) Kb=6.9Ã10-4 for diethylamine A 26.8 mL sample of 0.330 M diethylamine, (C2H5)2NH, is titrated with 0.333 M hydrobromic acid. The pH before the addition of any hydrobromic acid is ___ . B) Kb=6.3Ã10-5 for trimethylamine A 22.2 mL sample of 0.275 M trimethylamine, (CH3)3N, is titrated with 0.293 M nitric acid. At the equivalence point, the pH is ___. C) Kb=5.9Ã10-4 for dimethylamine A 25.9 mL sample of 0.239 M dimethylamine, (CH3)2NH, is titrated with 0.213 M hydroiodic acid. At the titration midpoint, the pH is ___.

Question

A) Kb=6.9Ã10-4 for diethylamine A 26.8 mL sample of 0.330 M diethylamine, (C2H5)2NH, is titrated with 0.333 M hydrobromic acid.  The pH before the addition of any hydrobromic acid is ___ . B) Kb=6.3Ã10-5 for trimethylamine A 22.2 mL sample of 0.275 M trimethylamine, (CH3)3N, is titrated with 0.293 M nitric acid.  At the equivalence point, the pH is ___. C) Kb=5.9Ã10-4 for dimethylamine A 25.9 mL sample of 0.239 M dimethylamine, (CH3)2NH, is titrated with 0.213 M hydroiodic acid.  At the titration midpoint, the pH is ___.

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