4) Al(OH)3+3HNO3=Al(NO3)3+3H2O
5) SO3+2KOH=K2SO4+H2O
7) SO3+CaO=CaSO4
9) H2S+Cu=H2+CuS
Щелочи-это вещество, состоящее из металла и группы OH(CaOH-гидроксид кальция)
Кислоты- это сложные вещества, состоящие из атомов водорода и кислотных остатков.(HNO2-азотистая кислота)
Двухсоставные кислоты - это кислоты, в состав которых входят 2 атома водорода.(H2SO4-серная кислота)
Кислые соли- это соли, содержащие два вида катионов: катион металла (или аммония) и катион водорода, и многозарядный анион кислотного остатка.(NaHCO3-гидрокарбонат натрия)
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