Fe+6HNO3=Fe(NO3)3+3NO2+3H2O
Fe(0)-3e=Fe(+3). 1. ок-ие
в-ль
N(+5)+1e=N(+4). 3. в-ие
ок-ль
2HNO₃ + Cu(OH)₂ = Cu(NO₃)₂ + 2H₂O1)Cu²⁺ + 2OH⁻ + 2H⁺ + 2NO₃⁻ = Cu²⁺ +2NO₃⁻ + 2H₂0
2)OH⁻ + H⁺ = H₂<span>0
</span>
<span>AgNO</span>₃ + NaCl = NaNO₃ + AgCl↓ 1)Ag⁺ + NO₃⁻ + Na⁺ + Cl⁻ = Na⁺ + NO₃⁻ + AgCl↓ <span>2)Ag</span><span>⁺</span><span> </span><span>+</span><span> </span><span>Cl</span><span>⁻</span><span> </span><span>=</span><span> </span><span>Ag</span><span>Cl</span><span>↓</span><span>
</span>
Na₂SO₃ +
2H₂SO₄ = 2NaHSO₄ + SO₂↑ + H₂O
1)2Na⁺ +
SO₃²⁻ + 4H⁺ + 2SO₄²⁻ = 2Na⁺ + 2HSO₄⁻ + SO2↑ + H2O
<span>2)SO</span><span>₃</span><span>²</span><span>⁻</span><span> + 4H</span><span>⁺</span><span> + 2SO</span><span>₄</span><span>²</span><span>⁻</span><span> = 2HSO</span><span>₄</span><span>⁻</span><span> + SO</span>₂<span>↑ + H</span>₂<span>O</span>
CO2 PH3 OF2 H2S-ковалентная полярная
H2 O2 Br2-ковалентная неполярная
Cu- металлическая
FeS KCL-ионная
Вариант А:
<span>3MgO+P2O5=Mg3(PO4)2
P2O5+3CaO=Ca(PO4)2
Вариант Б:
4Li+O2=2Li2O
2Fe+3Cl2=2FeCl3
Вариант В:
4Al+3O2=2Al2O3
4B+3O2=2B2O3</span>