POTASSIUM HYDROGEN SULFATE KHSO4Properties potassium hydrogen sulfate KHSO4: White. It melts without decomposition, on further heating decomposes. Readily soluble in water, creates an acidic environment due to the complete protolysis of the ion HSO4-. Does not form сrystalline hydrates. Neutralized by the alkali. Reacts with hydrogen peroxide. Obtaining potassium hydrogen sulfate KHSO4: 2KОН + H2SO4 (diluted) = K2SO4 + 2H2O, KОН + H2SO4 (conc., cold) = KHSO4 + H2O. K2SO4 (solid) + H2SO4(conc.) = 2KHSO4. Chemical reactions with potassium hydrogen sulfate KHSO4: 2KHSO4 = K2SO4 + H2SO4 (240°C). 2KHSO4 = K2S2O7 + H2O (320-340°C). KHSO4 (conc.) + 6H2O = [K(H2O)6]+ + HSO4-, HSO4- + H2O = SO42- + H3O+ (dilution with water). KHSO4 + KOH (conc.) = K2SO4 + H2O. KHSO4 + KCl = K2SO4 + HCl (450-700°C). KHSO4 + H2O2 (conc.) = KHSO3(O2) + H2O (0°C). 2KHSO4 + TiO2 = Ti(SO4)O + K2SO4 + H2O (300°C). 6KHSO4 + M2O3 = M2(SO4)3 + 3 K2SO4 + 3H2O (300-500°C; M = Al, Cr). 2KHSO4 (saturated) → Electrolysis → H2↑(cathode) + K2S2O6 (O2)(anode) (0-7°C). |
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In a chemical formula, the sum of the oxidation numbers is equal to zero.