1. Fe₂(SO₄)₃ + 6NaOH → 2Fe(OH)₃↓ + 3Na₂SO₄
2. Fe(OH)₃ → Fe₂O₃ + 3H₂O
3. <span>Fe</span>₂<span>O</span>₃<span> + 3H</span>₂<span>SO</span>₄<span>(разб.) → Fe</span>₂<span>(SO</span>₄<span>)</span>₃<span> + 3H</span>₂<span>O</span>
1) KCl=>K+Cl
2K+S=>K2S
K2S+HCl=>KCl+H2S
KCl+NaOH=>KOH+NaCl
KOH+NaCl=>KCl+NaOH
2) I'm sorry.это слишком долго><
Fecl2+2koh=fe(oh)2!+kcl
fe+2oh=fe(oh)2
вариант в)4
Mr(Zn(NO3)2) = 65 + 14*2 + 16*6 = 189
W(Zn) = Ar(Zn) * n / Mr(Zn(NO3)2 *100% = 65 *1 / 189 *100% = 34%