Нужно решить ионные ! 1) fecl2 + na2s = 2) fe(no3)3 + naoh = 3) pb(no3)2 + k2co3 =
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04.08.2019 08:00
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Fe(NO3)3+3NaOH=Fe(OH)3+3NaNO3
Pb(NO3)2+K2CO3=PbCO3+2KNO3
Fe2+ + 2CL- + 2Na + S- --> 2Na+ + 2CL- + FeS
Fe2+ +S- -->FeS↓
Fe(NO3)3+3NaOH-->Fe(OH)3↓+3NaNO3
Fe3+ 3NO3- + 3Na+ 3OH- ---> Fe(OH)3+3Na+ + 3NO3-
Fe3+ + 3OH- -->Fe(OH)3↓
Pb(NO3)2+K2CO3-->2KNO3+PbCO3↓
Pb2+ + 2NO3- + 2K+ +CO3 2- -->2K+ + 2NO3- +PbCO3
Pd2+ CO3 2- -->PbCO3