(5 points) Oliver Sacks is the author of a book entitled Uncle Tungsten, in whic
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Question
(5 points) Oliver Sacks is the author of a book entitled Uncle Tungsten, in which he shares the story of his chemical boyhood. The following is an excerpt from that book. I had smelled a bit of hydrogen sulfide in Uncle Dave's lab -it smelled of rotten eggs and (I was told) volcanoes. A simple way of making it was to pour dilute hydrochloric acid on iron(l) sulfide. The iron(l) sulfide I made myself by heating iron and sulfur together till they glowed and combined. (Note: the iron(ll) sulfide is the only product in this reaction.' The iron(l) sulfide bubbled when I poured hydrochloric acid on it, and instantly emitted a huge quantity of stinking, choking hydrogen sulfide gas. threw open the door into the garden and staggered out, feeling very queer and ill, remembering how poisonous the gas was. Meanwhile, the infernal sulfide (l had made a lot of it) was still giving off clouds of noxious gas, and this soon permeated the house. Write the balanced equations for the two reactions (bold print, numbered 1 and 2) described in the preceding paragraph. The second reaction is a double displacement reaction. What safety precautions would you recommend Oliver follow prior to performing the experiment again? Explain a. b.Explanation / Answer
I st experiment
Fe+S-----FeS
When iron reacts with sulphur ironsulphide is formed. Delta H of the reaction is-100KJ/mole that means the reaction is highly exothermic in nature.Heat liberated in this reaction is sufficient to cause remaining sulphur to ignite and burn with a light blue flame. So2 is the main product.
S+o2--------- So2 I t is a toxic gas . So the reaction should be carried out in a fume hood more convenient ly on a ceramic plate because heat is liberated
Second experiment
FeS+2HCl-------:FeCl2+H2S when iron sulphide reacts with hydrochloric acid it releases highly poisonous rotten egg smelling gas. It is an example of double decomposition reaction. Because sulphide and chloride ions are exchanged.
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