5HI + HIO3 = 3I2 + 3H2O
n HI = 0.1*0.75 = 0.075 моль
n HIO3 = 0.1*0.750 = 0.075 моль
m I2 = 0.075*3*254 = 57.15 г
ZnCl₂ + 2NaOH = Zn(OH)₂ + 2NaCl
Zn²⁺+ 2Cl⁻ + 2Na⁺ +2OH⁻ = Zn(OH)₂ + 2Na⁺ + 2Cl⁻
Zn²⁺+2OH⁻ = Zn(OH)₂
3MgCl₂ + 2H₃PO₄ = Mg₃(PO₄)₂ +6 HCl
3Mg²⁺ + 6Cl⁻ + 6H⁺ + 2PO₄³⁻ = Mg₃(PO₄)₂ +6 H⁺ + 6Cl⁻
3Mg²⁺+ 2PO₄³⁻ = Mg₃(PO₄)₂
H₂S + Na₂SO₃ = Na₂S + SO₂ +H₂O
2H⁺ + S²⁻ + 2Na⁺ + SO₃⁻ = 2Na⁺+S²⁻ + SO₂ +H₂O
2H⁺ + S²⁻ + SO₃⁻ = SO₂ +H₂O