(1) The instruments we need to prepare are: iron stand (2), hard glass tube, single-hole rubber race (2), alcohol lamp, test tube, alcohol blowtorch, double-hole rubber race, air pipe.
(2) Raw materials prepared: iron oxide powder, clarified lime water, carbon monoxide gas
(3) Installation diagram:
(4) Experimental steps:
①Check the air tightness of the device;
②Load the medicine and fix it;
③Pour carbon monoxide gas into the glass tube;
④ Heat the iron oxide;
⑤Stop heating;
⑥Stop the introduction of carbon monoxide
(5) Phenomenon: The red powder gradually turns black, the clarified lime water becomes turbid, and the exhaust gas burns to produce a blue flame.
(6) Chemical equation:
3CO+Fe2O3==high temperature==2Fe+3CO2
2CO+O2==ignite ===2CO2
Ca(OH)2+CO2=====CaCO3↓+H2O
(7) Note: The CO should be introduced first and then heating. After the experiment is completed, stop heating, and continue to pass CO until the test tube cools.
(8) Exhaust gas treatment: Because CO is poisonous, it cannot be arbitrarily discharged into the air. The principle of treatment is to burn CO into non-toxic CO2 or collect it for later use.
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