KI + AgNO₃ = AgI + KNO₃
K⁺ + I⁻ + Ag⁺ + NO₃⁻ = AgI + K⁺ + NO₃⁻
Ag⁺ + I⁻= AgI
Na₂O + 2HNO₃ = 2NaNO₃ + H₂O
Na₂O + 2H⁺ + 2NO₃⁻ = 2Na⁺ + 2NO₃⁻ + H₂O
<span>Na₂O + 2H⁺ = 2Na⁺ + H₂O</span>
2K +2H2O= 2KOH +H2 - с металлическим калием
2H2O+3S=SO2+ 2 H2S - со свободной серой
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