1.
PbO2+4HCl（濃）=PbCl2+Cl2↑+2H2O【類似于二氧化錳的反應】
2.
2HCl+Na2S2O3=S↓+SO2↑+2NaCl+H2O【S2O3 2-不穩(wěn)定,酸性條件下會歧化】
3.
HCl（濃）+HClO=Cl2↑+H2O【HClO強氧化性,濃HCl強還原性.歸中反應】
4.
2NaCl+H2SO4（濃）=[強熱]=Na2SO4+2HCl↑
【其實如果不加熱或者達不到強熱,就是NaCl+H2SO4（濃）=NaHSO4+HCl,加強熱相當于在此基礎上又發(fā)生了NaHSO4+NaCl=加熱=Na2SO4+HCl↑,總反應即為上面所寫】
5.
NaHSO4+NaCl=加熱=Na2SO4+HCl↑
6.
MnO2+2H2SO4+2NaCl=加熱=Na2SO4+MnSO4+Cl2↑
7.
2CH2=CH2+O2——催化劑（Ag）、△——→2CH2-CH2【生成環(huán)氧乙烷】
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