Aniline hydrochloride, [C6H5NH3]Cl, is a weak acid. Its conjugate base is the weak base aniline, C6H5NH2. Ka = 2.40 X 10^-5. Required:
1. Calculate pH at points if 50 mL of 0.100 aniline hydrochloride is titrated with 0.185 M NaOH.
2. Calculate the pH (a)before titration begins (b)at E. P (c) at the midpoint (d) after 20 mL of NaOH (e) after 30 mL of NaOH

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The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .