ALL REACTIONS

POTASSIUM SULFATE K2SO4

Properties potassium sulfate K2SO4:

White, heat-resistant. Readily soluble in water (no hydrolysis). Does not form сrystalline hydrates. Participates in exchange reactions. Reduced by hydrogen, carbon.

Obtaining potassium sulfate K2SO4:

2 KO2 + S = K2SO4 (130-140°C),

2 KO2 + SO2 = K2SO4 + O2 (100°C).

2 KОН + H2SO4 (diluted) = K2SO4+ 2H2O,

KОН + H2SO4 (conc., cold) = KHSO4 + H2O.

2 KHSO4 = K2SO4 + H2SO4 (240°C),

2 KHSO4 = K2S2O7 + H2O (320-340°C).

KHSO4 + KОН (conc.) = K2SO4 + H2O.

KHSO4 + KCl = K2SO4 + HCl (450-700°C).

2 KCl (solid) + H2SO4 (conc.) = K2SO4 + 2 HCl↑ (boiling).

K2S (solid) + 2O2 = K2SO4 (t>500°C).

K2S2O7 = K2SO4 + SO3 (t>440°C; impurity SO2, O2).

Chemical reactions with potassium sulfate K2SO4:

K2SO4 (diluted) + 12H2O = 2[K(H2O)6]⁺ + SO₄^2- (pH = 7).

K2SO4 (solid) + H2SO4 (conc.) = 2KHSO4.

K2SO4 + SO3 = K2S2O7.

K2SO4 + BaE2 = BaSO4↓ + 2KE (E = Сl-, OH-).

K2SO4 + BaS2O6 = K2S2O6 + BaSO4↓.

K2SO4 + 4 H2 = K2S + 4H2O (600°C, catalyst Fe2O3).

K2SO4 + 4C (coke) = K2S + 4CO (900°C).

K2SO4 + Ca(OH)2 + 2CO = K(HCOO) + CaSO4 (200°C, pressure),

2 K(HCOO) + O2 = K2CO3 + CO2 + H2O (700°C).