A 20.0-mL sample of 0.150 M ethylamine is titrated with 0.0981 M HCl. What is the pH

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A 20.0-mL sample of 0.150 M ethylamine is titrated with 0.0981 M HCl. What is the pH after the addition of 5.0 mL of HCl? For ethylamine, pK= 3.25.

a) 10.75 

b) 11.04 

c) 2.96 

d) 11.46

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