The mixing of which pair of reactants will result in a precipitation reaction? The mixing of which pair of reactants will result in a precipitation reaction? Li 2SO4(aq) + Ba(NO3)2(aq) NaNO3(aq) + NH4Cl(aq) CsI(aq) + NaOH(aq) HCl(aq) + Ca(OH)2(aq)