the phosphoric acid will donate a proton to the OH and then it will accept a hydrogen from the alpha hydrogen(one carbon next) to the one with the OH group and the electrons from that bond will kick down to the middle bond and the electrons to the protonated OH2+ group will kick off a water through an elimination method. Solution the phosphoric acid will donate a proton to the OH and then it will accept a hydrogen from the alpha hydrogen(one carbon next) to the one with the OH group and the electrons from that bond will kick down to the middle bond and the electrons to the protonated OH2+ group will kick off a water through an elimination method..