2Li+O2=Li2O
Li2O+H2O=2LiOH
2LiOH +H2SO4=Li2SO4 +2H2O
2Na + 2H₂O = 2NaOH + H₂↑
2NaOH + CuSO₄ = Cu(OH)₂ + Na₂SO₄
Cu(OH)₂ + 2HCl = CuCl₂ + 2 H₂O
2Mg+O2=>2MgO
MgO+2HCl=>MgCl2+H2O
MgCl2+2NaOH=>Ma(OH)2+2NaCl
BaCI2+H2SO4=BaSO4↓+H2O;
Mr(BaCI2)=208;
Mr(BaSO4)=233;
208г BaCI2 --- 233г BaSO4;
10,4г BaCI2 ---xг BaSO4;
x=10,4г*233г/208г=11,65г
CH3 - CH - CH3 + CuO = CH3 - C - CH3 + Cu + H2O
<span>Zn(OH)2+H2SO4→ZnSO4+2H2O</span>
<span>Zn(OH)2+2H+<u>SO4</u>→Zn+<u>SO4</u>+2H2O</span>
<span>Zn(OH)2+2H→Zn+2H2O</span>