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標題:

f 4 chem

發問:

state (i) expected observation (ii) full chemical eq. adding 1. ammonia solution to aluminium nitrate solution 2. sodium hydroxide solution to zinc sulphate solution 3. sodium hydroxide solution to iron( 2) sulpahte solution with explain ...plsss i really dont know how to do these ..><

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1. ammonia solution to aluminium nitrate solution (I) white precipitate form (II) 3NH4+(aq)+3OH-(aq)+Al(NO3)3(aq)-->3NH4NO3(aq)+Al(OH)3(s) 2.sodium hydroxide solution to zinc sulphate solution (I) white precipitate form (II)2NaOH(aq)+ZnSO4(aq)->Na2SO4(aq)+Zn(OH)2(s) 3.sodium hydroxide solution to iron( 2) sulpahte solution (I)Green precipitate form(because iron(II) ion is green) (II)2NaOH(aq)+FeSO4(aq)->Fe(OH)2(s)+Na2SO4(aq) 2009-03-16 19:36:32 補充： --> is - >

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