Problems using the Henderson-Hasselbalch equation: a base and its salt

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As a reminder, here is the Henderson-Hasselbalch Equation:

Problem #4:

A buffer is prepared containing 1.00 molar nicotine and 1.00 molar nicotine hydrochloride. What is its pH?

Problem #5:

A buffer is prepared containing 0.600 molar nicotine and 0.800 molar nicotine hydrochloride. What is its pH?

Problem #6:

A buffer is prepared containing 0.700 molar nicotine and 0.300 molar nicotine hydrochloride. What is its pH?

The Kb for nicotine is 1.05 x 10¯6

A brief word about nicotine hydrochloride. The formula for nicotine is C10H14N2. The salt is nicotine hydrochloride and its formula looks like this: C10H15N2+Cl¯.

Compare this to ammonia (formula NH3) and ammonum chloride (formula NH4+Cl¯)


Solutions to 4, 5, 6

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