5分钟记住中考化学必考9大“三角”关系，提分就这么轻松

今天特意为大家准备了中考常考的“三角关系”，赶快看看吧！

CaCO₃^高温CaO+CO₂↑

CaO+H₂O==Ca(OH)₂

Ca(OH)₂+CO₂==CaCO₃↓+H₂O

2H₂O₂^MnO22H₂O+O₂↑

2H₂O^通电2H₂↑+O₂↑

2H₂+O₂^点燃2H₂O

2C+O₂^点燃2CO

2CO+O₂^点燃2CO₂

C+O₂^点燃CO₂

C+CO₂^高温2CO

2H₂O+2Fe+3O₂ ^缓慢氧化2Fe₂O₃·H₂O

Fe₂O₃+6HCl==2FeCl₃+3H₂O

Al+FeCl₃==AlCl₃+Fe

2Fe+2Cl₃^点燃2FeCl₃

2Cu+O₂^加热2CuO

H₂+CuO ^△ Cu+H₂O

CuO+H₂SO₄==CuSO₄+H₂O

Cu+HgSO₄==CuSO₄+Hg

H₂SO₄+BaCl₂==BaSO₄↓+2HCl

HCl+AgNO₃==AgCl↓+HNO₃

H₂SO₄+Ba(NO₃)₂==BaSO₄↓+2HNO₃

Na₂CO₃+H₂SO₄==Na₂SO₄+H₂O+CO₂↑

Ca(OH)₂+Na₂CO₃==CaCO₃↓+2NaOH

2NaOH+CuSO₄==Cu(OH)₂↓+Na₂SO₄

Ca(OH)₂+CuSO₄==Cu(OH)₂↓+CaSO₄

Ca(OH)₂+（NH₄）₂SO₄==CaSO₄+2H₂O+2NH₃↑

Na₂CO₃+H₂SO₄==Na₂SO₄+H₂O+CO₂↑

Na₂SO₄+BaCl₂==BaSO₄↓+2NaCl

Na₂CO₃+2HCl===2NaCl+H₂O+CO₂↑

CaCO₃+2HCl==CaCl₂+H₂O+CO₂↑

CaCl₂+2AgNO₃==2AgCl↓+Ca(NO₃)₂

CaCO₃+2HNO₃==Ca(NO₃)₂+H₂O+CO₂↑