Elimination competes with substitution reactions, especially at high temperature. If that's the case, why did I not see more elimination in my 2 reactions? Reaction 1: 1-butanol (substrate), equimolar mixture of NH4Br and NH4Cl, concentrated H2SO4, and ice water (solvent) Reaction 2: 2-butanol (substrate), equimolar mixture of NH4Br and NH4Cl, concentrated H2SO4, and ice water (solvent)