If the strength of the following acids increases from left to right CH₃NH₂

Question

If the strength of the following acids increases from left to right
CH₃NH₂ < CH₃NH₃⁺ < C₆H₅NH₃ ⁺ < C₆H₅CO₂H < HCl

The order of increasing base strength, reading from left to right, must be:

Quizplus · Accepted Answer

The strength of a base is inversely related to the strength of its conjugate acid. Since HCl is the strongest acid, Cl⁻ is the weakest base. Conversely, CH₃NH₂ is the weakest acid, making CH₃NH⁻ the strongest base.

If the Strength of the Following Acids Increases from Left