Problems using the Henderson-Hasselbalch equation: an acid 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 anisic acid and 1.00 molar sodium anisate. What is its pH?

Problem #5:

A buffer is prepared containing 0.600 molar anisic acid and 0.800 molar sodium anisate. What is its pH?

Problem #6:

A buffer is prepared containing 0.700 molar anisic acid and 0.300 molar sodium anisate. What is its pH?

The Ka for anisic acid is 3.38 x 10¯5


Solutions to 4, 5, 6

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