Respuesta :
The the Brønsted-Lowry acid donates H⁻.
In this reaction Particle that loose H⁺ is A. NH4⁺ ion.
In this reaction Particle that loose H⁺ is A. NH4⁺ ion.
The answer to this question is A. NH4+. Its conjugate base is NH3 so NH4 donates a proton to OH- to become NH3 in the equilibrium reaction.