А1 -1
А2- 2
А3 - 4
А4 - 3
FeCl₃ + 3KOH = Fe(OH)₃ + 3KCl
Fe³⁺ +3Cl⁻ + 3K⁺ + 3OH⁻ = Fe(OH)₃ + 3K⁺ + 3Cl⁻
Fe³⁺ + 3OH⁻ = Fe(OH)₃
ответ: 1+3+3 +3 +1 +3 +3= 17
А5 - (-А-2, Б-5, В-1, Г-6)
С1
Na₂O₂ + 2Na = 2Na₂O
Na₂O + 2HCl = 2NaCl + H₂O
NaCl + AgNO₃ = NaNO₃ + AgCl