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A．\(\rm{Fe\xrightarrow[点燃]{{O}_{2}} Fe_{2}O_{3}\xrightarrow[]{{H}_{2}S{O}_{4}} Fe_{2}(SO_{4})_{3}}\) |
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B．饱和食盐水\(\rm{\xrightarrow[]{N{H}_{3},C{O}_{2}} NaHCO_{3}\xrightarrow[]{∆} Na_{2}CO_{3}}\) |
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C．海水\(\rm{\xrightarrow[]{熟石灰} Mg(OH)_{2}\xrightarrow[]{∆} MgO\xrightarrow[]{电解} Mg}\) |
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D．\(\rm{NH_{3}\xrightarrow[催化剂,∆]{{O}_{2}} N_{2}\xrightarrow[]{{O}_{2},{H}_{2}O} HNO_{3}}\) |