CH3NH3Cl, also known as methylammonium chloride, is considered an acid.
This compound is derived from methylamine (a weak base) and hydrochloric acid (a strong acid). When CH3NH3Cl is dissolved in water, it dissociates to form CH3NH3+ (the methylammonium ion) and Cl– (the chloride ion). The methylammonium ion can donate a proton (H+) to water, which leads to the formation of hydronium ions (H3O+) in solution, making the solution acidic.
In contrast, the chloride ion is the conjugate base of hydrochloric acid, which does not significantly affect the acidity of the solution. Therefore, because CH3NH3+ produces H+ upon dissociation, CH3NH3Cl behaves as an acid in aqueous solutions.