Na+2 N+4 O3¯2 ➡️ Na+2 N+2 O2¯2 + O2(наверху 0)
Электронный баланс:
N+4 (+2e) ➡️N+2 |2| |2|. >перед N ставим2
|4|
O2-2 (-4e)➡️2O |4|. |1|.
<span>2Na + O2 = Na2O<span>2
Na2O2 + 2H2O = 2NaOH + H2O2
</span></span>CH3COOH<span> + </span>NaOH<span> = </span>CH3<span>COONa + H2O
</span><span>CH3COONa + HBr = CH3COOH + NaBr
</span><span>2NaBr + Cl2 = 2NaCl + Br2
</span>2NaCl = 2Na + Cl<span>2 электролиз</span>
2СO + O₂ = CO₂
CO₂ + 2KOH = K₂CO₃ + H₂O
CO₂ + 2K⁺ + 2OH⁻ = 2K⁺ +CO₃²⁻ + H₂O
CO₂ + 2OH⁻ = CO₃²⁻ + H₂O
K₂CO₃ + MgCl₂ = MgCO₃ + 2KCl
2K⁺ +CO₃²⁻ + Mg²⁺ + 2Cl⁻ = MgCO₃ + 2K⁺ + 2Cl⁻
CO₃²⁻ + Mg²⁺ = MgCO₃
MgCO₃ = CO₂ + MgO