Пункт 1 (молекулярные уравнения).
1). 4Al + 3O2 = 2Al2O3
2). Al2O3 + 6HCl = 2AlCl3 + 3H2O
3). AlCl3 + 3NaOH = Al(OH)3 + 3H2O
4). Al(OH)3 + 3HNO3 = Al(NO3)3 + 3H2O
Пункт 2 (полное и сокращенное ионные уравнения).
Al(OH)3 + 3HNO3 = Al(NO3)3 + 3H2O
Аl(3+) + 3OH(-) + 3H(+) + 3NO3(-) = Al(3+) + 3 NO3(-) + 3H2O
H(+) + OH(-) = H2O.
Пункт 3 (ОВР).
4Al + 3O2 = 2Al2O3
Аl(0) -3е = Al(+3) - процесс: окисление, Al - восстановитель;
O2(0) +4е = 2O(-2) - процесс: восстановление, O2 - окислитель.
Пункт 4 (название веществ).
Al - алюминий;
O2 - кислород;
Al2O3 - Оксид алюминия;
HCl - соляная кислота;
AlCl3 - хлорид алюминия;
H2O - вода;
NaOH - гидроксид натрия;
Al(OH)3 - гидроксид алюминия;
HNO3 - азотная кислота;
Al(NO3)3 - нитрат алюминия.
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