<span>5Sn+12HNO</span>₃<span>(</span>разб<span>.) → 5Sn(NO</span>₃<span>)</span>₂<span>+ N</span>₂<span>↑
+ 6H</span>₂<span>O</span>
<span>Sn</span>⁰<span> +HN</span>⁺⁵<span>O</span>₃<span>(</span>разб<span>.)
→ Sn</span>⁺²<span>(NO</span>₃<span>)</span>₂<span> + N</span>₂⁰<span>↑ + H</span>₂<span>O</span>
Sn⁰ – 2e⁻ → Sn²⁺<span> | 5 </span>восстановитель
2N⁵⁺ + 10e⁻ →N₂⁰<span> | 1 </span>окислитель
<span>Sn + 4HNO</span>₃<span>(</span>конц<span>.) → SnO</span>₂<span> + 4NO</span>₂<span>↑ + 2H</span>₂<span>O</span>
<span>Sn</span>⁰<span> +HN</span>⁺⁵<span>O</span>₃<span>(</span>конц<span>.) → Sn</span>⁺⁴<span>O</span>₂<span> + N</span>⁺⁴<span>O</span>₂<span>↑ + H</span>₂<span>O</span>
Sn⁰ – 4e⁻ → Sn⁴⁺<span> | 1 восстановитель</span>
N⁵⁺ + e⁻ → N⁴⁺<span> | 4 окислитель</span>
<span>Sn + NaOH + 2H</span>₂<span>O → Na[Sn(OH)</span>₃<span>] +
H</span>₂<span>↑</span>
<span>Sn</span>⁰<span> + NaOH + H</span>₂⁺<span>O → Na[Sn</span>⁺²<span>(OH)</span>₃<span>] + H</span>₂⁰<span>↑</span>
Sn⁰ – 2e⁻ → Sn²⁺ |<span>
1 восстановитель</span>
2H⁺ + 2e⁻ → H₂⁰<span> | 1 окислитель</span>