Răspuns:MNaOH=23+16+1=40g/mol MFeCl3= 56+35,5.3=162,5g/mol 3NaOH+FeCl3=3NaCl+Fe[OH]3 hidroxid de fierIII hidoxid feric
ms FeCl3=500g C2%=25% C%=md.100/ms md FeCl3=c.ms/100 = md FeCl3=25.500/100=125g 3.40g NaOH................162,5gFeCl3 x........................................125g x=3.40.125/162,5=92,3g NaOH MS NaOH=MD.100/10 =92,3.100/10=923g SOLUTIE
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