What is the pKa of Benzyl Ammonium Ion?

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SUMMARY

The pKa of the Benzyl Ammonium Ion can be calculated using the relationship pKb + pKa = 14. Given the pKb of Benzylamine, the correct pKa can be derived by rearranging this equation. This method is essential for understanding the acid-base properties of ammonium ions in organic chemistry.

PREREQUISITES
  • Understanding of acid-base chemistry, specifically the concepts of pKa and pKb.
  • Familiarity with the relationship between pKa and pKb.
  • Knowledge of organic compounds, particularly amines and ammonium ions.
  • Basic mathematical skills for logarithmic calculations.
NEXT STEPS
  • Research the pKb values of various amines to compare their basicity.
  • Learn about the implications of pKa in biochemical reactions.
  • Study the role of ammonium ions in organic synthesis.
  • Explore the concept of conjugate acids and bases in greater detail.
USEFUL FOR

Chemistry students, organic chemists, and anyone studying acid-base equilibria in organic compounds.

Char. Limit
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Homework Statement



Find the pKa of Benzyl ammonium ion.

Homework Equations





The Attempt at a Solution



I have the pKb of Benzylamine. Am I correct in assuming that the pKa of benzyl ammonium ion is equal to 10^(-14)/pKb of benzylamine?
 
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Close, but not quite.

pKb + pKa = 14.
 
Oh, right. Thanks!
 

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