Chemistry · Carboxylic Acids and its Derivatives
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The pKa of n-propyl amine is
- A
3.24
- B
3.28
- C
3.32
- D
3.35
C is the correct option.
This option is incorrect. A pKₐ value of 3.24 is not typical for n-propylamine. While it’s close to the actual value, 3.24 is too low to be the correct pKₐ for n-propylamine. The actual value is typically reported as 3.32, indicating a slightly stronger conjugate acid.
This option is incorrect. 3.28 is also not the correct pKₐ for n-propylamine. It’s close but still not the most commonly accepted value. The pKₐ for n-propylamine is generally accepted to be around 3.32 in most sources.
This option is correct. The pKₐ of the conjugate acid of n-propylamine (which is n-propylammonium ion, C₃H₇NH₃⁺) is typically 3.32. This value reflects the strength of the conjugate acid, and since n-propylamine is a weak base, its pKₐ falls around this value.
This option is incorrect. A pKₐ of 3.35 is slightly higher than the typical value for n-propylamine's conjugate acid. While it's quite close, it does not reflect the most commonly reported pKₐ value of 3.32.
Tagged under Chemistry · Carboxylic Acids and its Derivatives · 2024