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Chem 3.3 - p block (3 - group 4 reactions) Flashcards

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16000821496CO as reducing agent - explanation + equationsC is +2, wants to be +4 so willing to donate CuO + CO -> Cu + CO2 Fe2O3 + 3CO -> 2Fe + 3CO20
16000832885Lead (IV) as oxidising agent - explanation + equationin +4 wants to be +2, so willing to gain electrons PbO2 + 4HCl -> PbCl2 + Cl2 + 2H2O1
16000851405acidic oxiesreact with H2O to form acid, is covalent H2O + CO2 -> H2CO3 H2CO3 <-> H+ + HCO3- (hydrogencarbonate ion) HCO3- <-> H+ + CO3- (carbonate ion)2
16000873031amphoteric oxidesreact with acids and bases, mainly covalent, some ionic characteristics PbO + 2HNO3 -> Pb(NO3)2 + H2O PbO + H2O + 2NaOH -> Na2[Pb(OH)4]3
16000884038Two chloride examplescarbon tetrachloride (CCl4) silicon tetrachloride (SiCl4)4
16000891215CCl4 reactions w/ waterimmiscible (no mix) as C has full outer shell and no d orbital to promote electrons to on same energy level (2)5
16000896317SiCl4 reaction w/ waterviolent reaction forming white fumes of HCl rapid hydrolysis takes place as although full outer shell, 3d orbital to promote e to6
16000906695Lead (II) w/ OH-if little OH-, white ppt forms Pb2+ + 2OH- -> Pb(OH)2 if XS, redissolves to colourless solution Pb(OH)2 + 2OH- -> [Pb(OH)4] 2-7
16000920322Lead (II) w/ Cl-white ppt, doesn't redissolve in XS Pb2+ + 2Cl- -> PbCl28
16000926073Lead (II) w/ I-bright yellow ppt Pb2+ + 2I- -> PbI29
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