Question

What are the pb values of ethylenediamine?

1) 4.072 (pb1) and 7.152 (pb2)
2) 4.072 and 7.152
3) 4.072 and 7.152 (pb1 and pb2)
4) 4.072 (pb2) and 7.152 (pb1)

Answer 1

The pKb values for ethylenediamine are pKb1 = 4.072 and pKb2 = 7.152, representing the proton affinities of the first and second nitrogen atoms.

Step-by-step explanation:

The student has asked about the value of pKb faor ethylenediamine. Ethylenediamine is a chelating agent and a base that can accept protons at two nitrogen atoms. Its two pKb values represent the equilibrium constants for these protonation reactions. The correct values for the protonation of ethylenediamine are pKb1 = 4.072 and pKb2 = 7.152. The pKb1 and pKb2 correspond to the protonation of the first and second nitrogen atoms of the molecule, respectively. It's important to remember that a lower pKb value indicates a stronger base. In an aqueous solution, a base with a lower pKb value would be expected to attract a proton more readily than one with a higher pKb value.aaa