VANREUTERAIDANGO VANREUTERAIDANGO Chemistry Answered Which of the following chemical reactions represents an acid-base reaction? HBr + KOH -> KBr + H2O ZnCl2 + MgSO4 -> ZnSO4 + MgCl2 H2SO4 + CaCl2 -> CaSO4 + HCl NH4OH + KCl -> KOH + NH4Cl