Predict the order of acid strengths in the following series of cationic species: CH3CH2NH3
+, CH3CH=NH2
+ and CH3C-NH+

CH3C-NH+> CH3CH=NH2 >CH3CH2NH3+

Explanation:

The acid strength has to do with the ease of the loss of hydrogen ion from the cationic specie. Hydrogen ion will easily be lost from any specie which contains an atom, group of atoms or bond which withdraws electrons along the chain of the N-H bond.

The pi bond system is known to be highly electronegative and withdraws electrons along the chain hence a withdrawal of electron density along the chain which makes the hydrogen ion to be easily lost from a system which contains a pi bond along the chain. A triple bond is more electronegative than a double bond, hence the answer above.

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it’s previous models   because when i picked that son of a gun’s answer it was wrong look for previous models because they might make it a different letter