A 0.558-g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in
Question:
A 0.558-g sample of a diprotic acid with a molar mass of 255.8 g/mol is dissolved in water to a total volume of 25.0 mL. The solution is then titrated with a saturated calcium hydroxide solution.
a. Assuming that the pKa values for each ionization step are sufficiently different to see two equivalence points, determine the volume of added base for the first and second equivalence points.
b. The pH after adding 25.0 mL of the base is 3.82. Find the value of Ka1.
c. The pH after adding 20.0 mL past the first equivalence point is 8.25. Find the value of Ka2.
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a Determining the volume of added base for the first and second equivalence points A diprotic acid has two dissociation steps each with its own equivalence point At the first equivalence point all of ...View the full answer
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