(5)金属的还原性KCl(s) + Na(s) = NaCl(s) + K(s) G = 25.01 kJ· mol-1 2RbCl(s) + Ca(s) = CaCl2(s) + 2Rb(s) G = 67.54 kJ· mol-1 2CsCl(s) + Ca(s) = CaCl2(s) + 2Cs(s)
G = 81.00 kJ· mol-1金属钠、镁等被用作制取钽、钛等金属的还原剂 K2TaF7 + 5Na = Ta + 5NaF + 2KF TiCl4 + 4Na = Ti + 4NaCl TiCl4 + 2Mg = Ti + 2MgCl2