2NaOH + FeCl₂ = Fe(OH)₂ + 2NaCl
2Na⁺ + 2OH⁻ + Fe²⁺ + 2Cl⁻ = Fe(OH)₂ + 2Na⁺ + 2Cl⁻
2OH⁻ + Fe²⁺ = Fe(OH)₂
V(H2S) = 33.6 л
n = V/Vm = 33.6/22.4 = 1.5 моль
n = N/Na;
1.5 = N/6.02*10²³
N = 1.5*6.02*10²³ = 9.03 * 10²³
1. Mn²⁺ - 2e⁻ = Mn⁴⁺
O₂° + 4e = 2O²⁻
S²⁻- 6e⁻=S⁴⁺
2.Mn⁴⁺-2e=Mn⁶⁺
O₂° +4e⁻=2O²⁻
3.Mn⁶⁺-1e⁻ = Mn⁷⁺
Cl₂° + 2e⁻ = 2Cl⁻
4.Mn⁷⁺ + 5e⁻ = Mn²⁺
2O²⁻ - 4e⁻ = O₂°
5.Mn²⁺ + 2e⁻ = Mn°
Mg° - 2e⁻ = Mg²⁺<u />
3MgO2 + 4Al = 2Al2O3 + 3Mg
m(MgO2) = m(MgO2техн)*(1-ω) = 200*(1-0.07) = 183 г
n(MgO2) = m/M = 186/56 = 3.32 моль
Из уравнения реакции:
n(Mg) = 3.32*3/3 = 3.32 моль
m(Mg) = n*M = 3.32*24 = 79.68 г