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A 26.1 mL sample of 0.316 M ethylamine, C2H5NH2, is titrated with 0.249 M hydroiodic acid....

A 26.1 mL sample of 0.316 M ethylamine, C2H5NH2, is titrated with 0.249 M hydroiodic acid.
After adding 12.4 mL of hydroiodic acid, the pH is______ .

B.A 21.5 mL sample of 0.261 M ethylamine, C2H5NH2, is titrated with 0.210 M hydrobromic acid.
After adding 39.0 mL of hydrobromic acid, the pH is ______


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