Verified answer

а) Fe(NO3)3 + 3NaOH = Fe(OH)3 + 3NaNO3

2Fe(OH)3 + 3H2SO4 = Fe2(SO4)3 + 6H2O

б) 2Fe + 3Cl2 = 2FeCl3

FeCl3 + 3KOH = Fe(OH)3 + 3KCl

в) Fe + 2HCl = FeCl2 + H2

FeCl2 + Ba(OH)2 = Fe(OH)2 + BaCl2

Ответ: А - NaOH, H2SO4; Б - Cl2, KOH; В - HCl, Ba(OH)2