Существует несколько типов окисления алкенов, одно происходит при низких температурах (от 0 до 20 градусов), другое идёт при нагревании (см. приложение).
<span>C → CO</span>₂<span> → Na</span>₂<span>CO</span>₃<span> → CO</span>₂<span> → CaCO</span>₃
<span><span>
1) </span>C + O</span>₂<span> → CO</span>₂<span>;</span>
<span><span>2) </span>CO</span>₂<span> +
2NaOH →<span>
Na</span></span>₂<span><span>CO</span></span>₂<span><span> + H</span></span>₂<span><span>O;</span></span>
<span><span>3) </span><span>Na</span></span>₂<span><span>CO</span></span>₃<span><span> + 2HCl </span>→ 2NaCl + CO</span>₂<span>↑
+ H</span>₂<span>O;</span>
<span><span>4) </span><span>CO</span></span>₂<span><span> +
Ca(OH)</span></span>₂<span><span> </span>→ CaCO</span>₃<span>↓<span> + H</span></span>₂<span><span>O</span></span>
Ответ:
Объяснение:
2KMnO4 -> K2MnO4 + MnO2 + O2
O2 + 2H2 = 2H2O
O2 + C = CO2