H3PO4+3KOH=K3PO4+3H2O
3H(+)+PO4(3-)+3K(+)+PO4(3-)=3K(+)+PO4(3-)+H2O
2NH4OH+H2SO4=(NH4)2SO4+H2O
2NH4(+)+OH(-)+2H(+)+SO4(2-)=2NH4(+)+SO4(2-)+H2O
<span><span>NaCl</span>+<span>H2O</span> → <span>NaOH</span>+<span>HCl
</span></span><span><span>Na2O</span>+<span>H2O</span> → <span>2<span>NaOH</span></span></span><span><span>2
<span>Na</span></span>+<span>2<span>H2O</span></span> → <span>2<span>NaOH</span></span>+<span>H<span>2</span></span></span>
<em>NH₄NO₂ → N₂↑ + 2H₂O. </em>
<em>N³⁻ – 3e → N⁰ | 1 | восстановитель, окисление </em>
<em>N³⁺ + 3e → N⁰ | 1 | окислитель, восстановление </em>